SQL Request connection string error

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I have written a WCF service with database connection in Visual Studio 2012. When I deploy the database on my server I get a The server encountered an error processing the request. The exception message is 'Instance failure.'. See server logs for more details. error.

I followed the steps from to help me but it only helped me to an extent. My connection string seems to be the problem. My connection string is Data Source=.\\MSSQLSERVER;Database=jarvis;Integrated Security=SSPI;User Id=sa;Password=123.

The server that I am using is running SQL Server 2012 Developer edition. What courses this problem and how can I fix this?

Posted 17-Jul-14 10:21am

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Maciej Los · Accepted Answer · 2014-07-17T11:27:00

First of all, check connection string: http://www.connectionstrings.com/sql-server/[^]

You need to properly setup SQL Server to enable tcp/ip or named pipes connections.
See: http://msdn.microsoft.com/en-us/library/ms189321.aspx[^]
http://msdn.microsoft.com/en-us/library/ms181035.aspx[^]
http://technet.microsoft.com/en-us/library/aa178138%28v=sql.80%29.aspx[^]

In some cases, you need to setup Windows Firewall: http://msdn.microsoft.com/en-us/library/cc646023.aspx[^]