A network-related or instance-specific error occurred 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 Provider, error: 40 - Could not open a connection to SQL Server)
NOTE:- i am 2 times installed sqlserver .. but same problem is comeing .
pls tell the solution