I have installed SQL Server 2005 but there is no server, I have reinstalled it about 5 times and the same problem never changes.
And here is the error message
Cannot connect to ..
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) (Microsoft SQL Server, Error: 2)