This is the error I am receiving when connecting to our SQL Server 2003 database
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: 121) "the semaphore time out has expired"
but when I try to connect using another pc its working
This is a weird error message "the semaphore time out has expired" and I've tried all the possible solution related to the link that you gave