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Apr 20, 2012 04:06 PM|LINK
This is about connection between your application with SQL Server. Make sure all name, profile, authority has been set properly. You can localize the problem for example you can turn off your firewall, set the servername on your application, and others.
You may also contact your database administrator. You may also look at SQL Server manager and try to enable some of parameter on it, for example enable one by one all protocols, and do not forget to restart your server any time you change these parameters.
Hope this can help