Comments on: SQL SERVER – Fix : Error : 40 – could not open a connection to SQL server – Fix Connection Problems of SQL Server

By: vera

vera — Mon, 05 Dec 2011 19:30:29 +0000

I think I followed all the suggestion above but I still have problem.
I can login to the SQL server 2008 locally with windows or sql authentication. The server is running in Windows Server 2008 R2 added in a domain. (not a dc)
I enabled Remote Connection.
I started and enabled automatically, the SQL Server Browser service.
I added TCP port 1433 to both server 2008 r2 and Windows 7 firewall. I also added UDP port 1434 from the server firewall. I also turnoff the firewall on both server and desktop computer.
Installed MS SQL Management Studio in Windows 7 which is not in a domain.
I can ping the SQL server
I can also see the SQL server in the MS SQL Management Studio in Windows 7.
But when I try to remotely connect in Windows 7 using the SQL authentication, it gives me this error:

I can’t connect to the SQL Server with an error “Cannot connect to . A network-related or instance-spedivic error occured while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provided, error: 40- Could not open a connection to SQL Server) (Microsoft SQL Server, Error:5)”

Please help,
vera

By: guru

guru — Wed, 16 Nov 2011 11:22:44 +0000

Thanks Dude! Its working fine…

By: any

any — Sun, 06 Nov 2011 15:11:33 +0000

Suggestion 2 works for me ^^
but only until 2 point…. i didnt found “SQL Server Surface Area configuration”. any way thanks

By: Richa Dubey

Richa Dubey — Sun, 21 Aug 2011 13:58:02 +0000

hi,
im getting the same problem Error:40 in sql server 2008
plz plz help me

By: Yamie

Yamie — Mon, 08 Aug 2011 18:32:21 +0000

thanks alot….. got a solution

By: shreeniwas

shreeniwas — Thu, 30 Jun 2011 04:07:10 +0000

That is image solution yaar…

By: Mitesh

Mitesh — Thu, 09 Jun 2011 05:18:02 +0000

Thanks a lot.. It worked

By: Bob

Bob — Sun, 01 May 2011 03:29:46 +0000

can anyone provide info on how to get SQL 2008 past that STUPID error 40. I am trying to get to run on a single XP system. I have tryed all the fixes i could figure out but nothing works so far. I am `REALLY sick of SQL!!!
Thanks Bob

By: madhava

madhava — Fri, 18 Feb 2011 11:29:01 +0000

hi i got the error 89845dcd8080cc91 when i am installing an application in to POC server can u pls suggest the solution

By: Semanda Thomas

Semanda Thomas — Wed, 05 Jan 2011 16:02:18 +0000

Hi we have been working pretty well with the above mentioned application.
Its only today that it has mis-behaved.

Thanks alot.

By: Semanda Thomas

Semanda Thomas — Wed, 05 Jan 2011 16:00:34 +0000

Hi there!
I need help.
Am running a windows server 2008 R2.

We have installed Microsoft Dynamics Navision 2009.
At one point i tried opening Microsoft Dynamics Navision, i got this error:

” The Microsoft Dynamics NAV server cannot connect the Change Listener to SQL server because of the following error: A network -related or instance error occurred while establishing a connection to SQL server”
provider : named pipes provider error: 40 – couldn’t open a connection to SQL server,.

Please help, our office is down

By: Anna Nebres

Anna Nebres — Wed, 24 Nov 2010 09:02:48 +0000

thank you Imran…

Your suggestion really helped me a lot..

By: YESSSSSSSS

YESSSSSSSS — Fri, 05 Nov 2010 18:13:28 +0000

I completely solve the problem from instruction of one GURU above replies, and I will copy again for sure to implement that instruction I have SQL Server 2008, Vista and VS2010.

and Thank to:

Saurabh >>>> You are amaizing GURU

here is:

I was facing same problem but got the solution. I use Vista.
Go to Computer Management >> Service and Application >> SQL Server 2005 Configuration >> Network Configuration
Enable TCP/IP protocol >> Right hand click to open properties of TCP/IP protocol >> open Ip Adresses Tab >> IPAll >> TCP Dynamic port >> put the value 1433 if it’s different. Hope this will help anybody if anybody is facing the problem on Vista.

By: jagdeep

jagdeep — Wed, 15 Sep 2010 04:30:38 +0000

when i start the services it says sql server on the local computer start then stopped. some services stopped automatically if they dont have any work to do. for example
logs and alert services.

By: jagdeep

jagdeep — Wed, 15 Sep 2010 04:20:42 +0000

hey friend anybody among u using visual studio for asp.net in window 7?

By: jagdeep

jagdeep — Tue, 14 Sep 2010 08:10:00 +0000

when i start the services it says sql server on the local computer start then stopped. some services stopped automatically if they dont have any work to do. for example
logs and alert services.

By: ticardiff

ticardiff — Tue, 24 Aug 2010 08:28:27 +0000

thanks to Saurabh with his step by step.
i’m using windows 7 and an error 40.
with his solution, it’s now sorted
Thanks again

By: Madhivanan

Madhivanan — Wed, 04 Aug 2010 08:08:04 +0000

You can connect to SQL Server 2008 as you connect to other versions. Make sure to have a proper connection string. See http://www.connectionstrings.com/

By: Stephan

Stephan — Wed, 04 Aug 2010 06:17:59 +0000

Hi,

I hv developed a small project in Visual Basic 6 with sql server 2000 as database. I wanted to know that whether it is possible to use sql server 2008 as database with vb6 application, if yes pl guide me how to connect the server.

thank a ton in advance

Stephan

By: Mehboob

Mehboob — Thu, 24 Jun 2010 16:28:39 +0000

I had read the links above,i had apply those setting but unfortunately i still can’t connect to SQL Server2008 remotely

By: paul ford

paul ford — Mon, 14 Jun 2010 18:30:58 +0000

This by far is one of the more irritating errors with MS dev tools. MYSQL just works. Anyway after installing multiple times MSSQL SErver 2008 and R2 versions on my win 7 ultimtate os I found that sql management tools failed to browse any DB engine that was present until……….
in the server dialog I entered my \. For me both my machine and instance name are neptune e.g. NEPTUNE\NEPTUNE and the co nnection worked immediately.

What bothers me the most is that when /I initiated a browse for any engine this did not come up. Even after turning off the firewall and ensuring the sql configuration was correct, named pipes and TCP 1433 enabled also.

Needles to say it works now thank goodness ;) Hope this helps someone.

By: Virendra

Virendra — Sat, 12 Jun 2010 11:50:30 +0000

Exllent Solutions

By: najla

najla — Fri, 23 Apr 2010 14:17:38 +0000

Hello, i faced this problem in the first time when i installed sqlserver2005 . And it was solved by implementing the solution in this problem. i had to uninstall the program and re-install it again for some problems in my pc. But when i re-installed it , i had to change the instance name. Because it wouldn’t work without that , and it gives me an error. Now i have this error when i try to establish a new connection or add a database to my project.

http://i39.tinypic.com/2quiyyv.jpg

By: Pinal Dave

Pinal Dave — Wed, 17 Mar 2010 16:58:46 +0000

Hello Rakesh,

Sometime it happens that using the ip address with correct port connects successfully but using the server name not.

Regards,
Pinal Dave

By: Rakesh

Rakesh — Wed, 17 Mar 2010 09:34:23 +0000

19.

I am getting the same error (An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 – Could not open a connection to SQL Server) )

Only SQLserver (MSSQLSERVER) and
SQLserver Agent (MSSQLSERVER)
was not start and give above error massage

I tried and tested all the possibilities but all were unsuccessful.

The same Application is running successfully on other server having same configuration.

Please help in above matter.