database connectivity

database connectivity

  

hi ,

       i  am using SQL SERVER MANAGEMENT STUDIO to connect with the outsystems . actually server studio ask for server name. i gave my local pc name as a server name that is RAJ\SQLEXPRESS here raj is a pc name.

but when i trying to connect with outsystems using service center it gives the following error.

error:Connection String test failed: 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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) 

    please share your suggestion sir.

thank you