Comments on: SQL SERVER – Fix : Error: 18452 Login failed for user ‘(null)’. The user is not associated with a trusted SQL Server connection. http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/ Notes of a SQL Server MVP and Database Administrator Sat, 21 Nov 2009 05:54:09 +0000 http://wordpress.com/ hourly 1 By: Paul Godfrey http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57526 Paul Godfrey Wed, 11 Nov 2009 16:23:16 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57526 Great Site. My PC had been renamed. "kaleeswar B" was correct. This caused the error. Many thanks for the advice. Great Site. My PC had been renamed. “kaleeswar B” was correct. This caused the error. Many thanks for the advice.

]]> By: Francesco http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57374 Francesco Fri, 06 Nov 2009 06:12:14 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57374 Thanks a lot for your article, it helped me to solve the problem. Good job!!! Thanks a lot for your article, it helped me to solve the problem. Good job!!!

]]> By: Allen http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57368 Allen Thu, 05 Nov 2009 21:24:29 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57368 http://social.msdn.microsoft.com/Forums/en/sqlsecurity/thread/48ee6a1b-9aad-48a6-90e4-b8f4b93d0107 also deals with this. The server may have to be set to support Mixed Authentication for non Windows Authentication logins to work. The install default is Windows Authentication only I think. http://social.msdn.microsoft.com/Forums/en/sqlsecurity/thread/48ee6a1b-9aad-48a6-90e4-b8f4b93d0107

also deals with this. The server may have to be set to support Mixed Authentication for non Windows Authentication logins to work. The install default is Windows Authentication only I think.

]]> By: nick http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57337 nick Thu, 05 Nov 2009 02:39:59 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-57337 How could I run this code in Query Analyser if I'm unable to login to server? How could I run this code in Query Analyser if I’m unable to login to server?

]]> By: Tim http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56733 Tim Thu, 15 Oct 2009 17:57:16 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56733 Mine turned out to be a change to a registry key for Rightfax. I had to include a user and password in the registry key. Apparently Rightfax only looks at the ODBC driver for the server name, why bother at all?! Mine turned out to be a change to a registry key for Rightfax. I had to include a user and password in the registry key. Apparently Rightfax only looks at the ODBC driver for the server name, why bother at all?!

]]> By: ananth http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56712 ananth Thu, 15 Oct 2009 04:36:22 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56712 Hi, I too have the same problem. So long i am getting errors for SSPI handshake and login failed for the user etc. This blog was very helpful.. Thanks a lot... For me, the solution was the host had two DNS names. So, I had changed the DNS to the same which is recognized under Network (My Computer --> Properties --> Network Identification) in client network utility. (Run --> cliconfg). Restart the SQL Server. It won't show any more errors in Agent log & event viewer ... It will allow windows authentication also... Hi,

I too have the same problem. So long i am getting errors for SSPI handshake and login failed for the user etc. This blog was very helpful.. Thanks a lot…

For me, the solution was the host had two DNS names. So, I had changed the DNS to the same which is recognized under Network (My Computer –> Properties –> Network Identification) in client network utility. (Run –> cliconfg). Restart the SQL Server. It won’t show any more errors in Agent log & event viewer … It will allow windows authentication also…

]]> By: Wyatt Wong http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56226 Wyatt Wong Tue, 29 Sep 2009 02:57:41 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56226 I have solved the problem, after changing the connection to "SQL Server and Windows Authentication mode", I need to stop the SQL Server Service and SQL Server Agent Service and restart them. I have solved the problem, after changing the connection to “SQL Server and Windows Authentication mode”, I need to stop the SQL Server Service and SQL Server Agent Service and restart them.

]]> By: Wyatt Wong http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56225 Wyatt Wong Tue, 29 Sep 2009 02:20:54 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-56225 I have already change the mode to "SQL Server and Windows Authentication mode" but I am still getting the error of "The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452). Why is that ? I have already change the mode to “SQL Server and Windows Authentication mode” but I am still getting the error of “The user is not associated with a trusted SQL Server connection. (Microsoft SQL Server, Error: 18452).

Why is that ?

]]> By: codingace http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55922 codingace Wed, 16 Sep 2009 18:06:27 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55922 This advice is great unless you are ALREADY in mixed mode on SQL 2005 and STILL receiving the same error. The services HAVE been restarted and STILL receiving the same error. I am using Rightfax. It is trying to alert the database that the fax was successful. My System DSN (ODBC connection) verifies fine using SQL user and password, but when the Rightfax program goes to run the process, It gives me the dreaded User not associated error and the user is ''. This is maddening! I have spent two full days so far, but all I find is change the mode to mixed mode, I am already there! This advice is great unless you are ALREADY in mixed mode on SQL 2005 and STILL receiving the same error. The services HAVE been restarted and STILL receiving the same error. I am using Rightfax. It is trying to alert the database that the fax was successful. My System DSN (ODBC connection) verifies fine using SQL user and password, but when the Rightfax program goes to run the process, It gives me the dreaded User not associated error and the user is ”. This is maddening! I have spent two full days so far, but all I find is change the mode to mixed mode, I am already there!

]]> By: Ian Dow http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55745 Ian Dow Wed, 09 Sep 2009 09:14:08 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55745 Solved. The connectionstring line was at fault, it should have been connectionString="Data Source=.\SQLEXPRESS;INITIAL CATALOG=HandScanning;Integrated Security=SSPI;User Instance=False" Instead of "Integrate Security=SSPU;user instance=false, " I had "id=PC\Aministrator;pwd=" So this error can also relate to errors in the constuction of the connectionstring Solved.
The connectionstring line was at fault, it should have been
connectionString=”Data Source=.\SQLEXPRESS;INITIAL CATALOG=HandScanning;Integrated Security=SSPI;User Instance=False”

Instead of “Integrate Security=SSPU;user instance=false, ”
I had “id=PC\Aministrator;pwd=”

So this error can also relate to errors in the constuction of the
connectionstring

]]> By: Schmuli http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55737 Schmuli Wed, 09 Sep 2009 05:44:18 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55737 Thank you. Thank you.

]]> By: Ian Dow http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55735 Ian Dow Wed, 09 Sep 2009 05:14:22 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55735 I am having the error "Login failed for user 'sa'. The user is not associated with a trusted SQL Server connection.". I have Windows XP Service Pack 2, I have MS SQL 2005 Express, I can have either 'Windows Authentication' or 'SQL server Authentication' in SQL. I have MS SQL Server Compact 3.5 Design, ENU, I have MS SQL Server Native Client I have just removed passwords for sa, and my login in the SQL server. How can I solve this error please? I am having the error
“Login failed for user ’sa’. The user is not associated with a trusted SQL Server connection.”.

I have Windows XP Service Pack 2,
I have MS SQL 2005 Express,
I can have either ‘Windows Authentication’ or ‘SQL server Authentication’ in SQL.
I have MS SQL Server Compact 3.5 Design, ENU,
I have MS SQL Server Native Client

I have just removed passwords for sa, and my login in the SQL server.

How can I solve this error please?

]]> By: ramakrishna dodda http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55289 ramakrishna dodda Thu, 27 Aug 2009 07:10:40 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-55289 when we are running the insert statement with the linked server, it is working fine. If i create the job , it is failing with the folowing error Executed as user: SYNTEL\user1. Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. [SQLSTATE 28000] (Error 18452). The step failed. We are getting the error in sql 2000. Regards, D.RamaKrishna when we are running the insert statement with the linked server, it is working fine.
If i create the job , it is failing with the folowing error
Executed as user: SYNTEL\user1. Login failed for user ‘(null)’. Reason: Not associated with a trusted SQL Server connection. [SQLSTATE 28000] (Error 18452). The step failed.

We are getting the error in sql 2000.

Regards,
D.RamaKrishna

]]> By: René http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-54842 René Fri, 14 Aug 2009 06:01:23 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-54842 I had the same problem. SQL 2000 on a server in windows authentication mode. The Active Directory role set in the SQL security tab. My colleagues could log on to the server using the enterprice manager. I couldn't, getting the same error "Login failed for user ‘(null)’. The user is not associated with a trusted SQL Server connection". Setting the server in mixed mode is no option because of business policy. The solution: With the windows explorer I connected to a shared directory on the server. Problem solved. I don't understand why or how, but it works. I had the same problem.
SQL 2000 on a server in windows authentication mode.
The Active Directory role set in the SQL security tab.
My colleagues could log on to the server using the enterprice manager. I couldn’t, getting the same error “Login failed for user ‘(null)’. The user is not associated with a trusted SQL Server connection”. Setting the server in mixed mode is no option because of business policy.

The solution:
With the windows explorer I connected to a shared directory on the server.
Problem solved.

I don’t understand why or how, but it works.

]]> By: Feby Adityawan http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-54497 Feby Adityawan Thu, 06 Aug 2009 02:32:54 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-54497 Thx, mean while it works. I have many servers, and one of them is in different network We just do this "Frank Stevens This is for WINDOWS AUTHENTICATION: I received this error when connecting to the SQL Server remotely via my application. After researching, I found that you had to both enable trusted authentication on my SQL Server machine and grant the User Right “Enable computer and user accounts to be trusted for delegation” (Group Policy…under Local Policies\User Rights Assignment) to the Windows account you are using. I just granted it for the Administrators group. For the SQL Server machine, I set the property in Active Directory (check the box labeled “Trust computer for delegation” in the computer’s properties). Make sure you for the group policy changes (gpupdate /force)." so..our domain controller (on other network) had virus, virus attacking security system, sometime it grant the active directory and sometime it doesn't (Aaarrgghh..) Thx, mean while it works.

I have many servers, and one of them is in different network
We just do this

“Frank Stevens

This is for WINDOWS AUTHENTICATION:

I received this error when connecting to the SQL Server remotely via my application. After researching, I found that you had to both enable trusted authentication on my SQL Server machine and grant the User Right “Enable computer and user accounts to be trusted for delegation” (Group Policy…under Local Policies\User Rights Assignment) to the Windows account you are using. I just granted it for the Administrators group.

For the SQL Server machine, I set the property in Active Directory (check the box labeled “Trust computer for delegation” in the computer’s properties).

Make sure you for the group policy changes (gpupdate /force).”

so..our domain controller (on other network) had virus, virus attacking security system, sometime it grant the active directory and sometime it doesn’t (Aaarrgghh..)

]]> By: Josh http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-54017 Josh Thu, 23 Jul 2009 14:09:22 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-54017 Thanks! That fixed it! Thanks! That fixed it!

]]> By: krishna http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-53269 krishna Fri, 26 Jun 2009 06:51:08 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-53269 I tried the above script but getting erro Incorrect syntax near 'LOGIN'. I tried the above script but getting erro
Incorrect syntax near ‘LOGIN’.

]]> By: Art http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-52549 Art Fri, 29 May 2009 21:25:05 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-52549 I have my Server set to SQL Server and Windows Authentication Mode, but I get "Login filed for user ''. My app settings are as follows: In my web.config settings, I have the authentication mode defined within as follows: I have been wrestling with this problem for over a week and still don't have a solution. My problem seems similar to the others, but I already had the authentication mode set to both Windows and SQL Server. Can you tell me what I need to do to correct my error? Thank you very much, Art P.S. The error message with stack is as follows: Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Login failed for user ''. Source Error: Line 28: pw = Request.Form("password") Line 29: Line 30: If UserLogin(reg, pw) Then Line 31: Response.Redirect("MainMenu.aspx") Line 32: Else Source File: C:\Users\Art\Documents\Visual Studio 2008\WebSites\WebSite1\Login.vb Line: 30 Stack Trace: [SqlException (0x80131904): Login failed for user ''.] System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +4846887 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +194 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2392 System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +35 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +144 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +342 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +221 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +189 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +185 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +31 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +433 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +499 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +65 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +117 System.Data.SqlClient.SqlConnection.Open() +122 PC.DbAccessor.GetDR(String cSQL) +127 PC.EDUPage.UserLogin(String aUserName, String aPassword) +176 Login.cmdLogin_Click(Object sender, EventArgs e) in C:\Users\Art\Documents\Visual Studio 2008\WebSites\WebSite1\Login.vb:30 System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111 System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110 System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10 System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13 System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565 I have my Server set to SQL Server and Windows Authentication Mode, but I get “Login filed for user ”.
My app settings are as follows:

In my web.config settings, I have the authentication mode defined within as follows:

I have been wrestling with this problem for over a week and still don’t have a solution. My problem seems similar to the others, but I already had the authentication mode set to both Windows and SQL Server.
Can you tell me what I need to do to correct my error?
Thank you very much,
Art
P.S. The error message with stack is as follows:
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Login failed for user ”.

Source Error:

Line 28: pw = Request.Form(“password”)
Line 29:
Line 30: If UserLogin(reg, pw) Then
Line 31: Response.Redirect(“MainMenu.aspx”)
Line 32: Else

Source File: C:\Users\Art\Documents\Visual Studio 2008\WebSites\WebSite1\Login.vb Line: 30

Stack Trace:

[SqlException (0x80131904): Login failed for user ''.]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +4846887
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +194
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2392
System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +35
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +144
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +342
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +221
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +189
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +185
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +31
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +433
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +499
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +65
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +117
System.Data.SqlClient.SqlConnection.Open() +122
PC.DbAccessor.GetDR(String cSQL) +127
PC.EDUPage.UserLogin(String aUserName, String aPassword) +176
Login.cmdLogin_Click(Object sender, EventArgs e) in C:\Users\Art\Documents\Visual Studio 2008\WebSites\WebSite1\Login.vb:30
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565

]]> By: Godwin http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-52488 Godwin Wed, 27 May 2009 18:01:45 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-52488 Its helpful. Thank u Its helpful. Thank u

]]> By: Reena http://blog.sqlauthority.com/2007/04/14/sql-server-fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-51729 Reena Sat, 09 May 2009 07:11:26 +0000 http://blog.sqlauthority.com/2007/04/14/fix-error-18452-login-failed-for-user-null-the-user-is-not-associated-with-a-trusted-sql-server-connection/#comment-51729 Thank you!!! Pinal Dave....This article really helped a lot.... Thank you!!! Pinal Dave….This article really helped a lot….

]]>