Database error, HELP

I have uploaded my database to the server, then when I want to test it with my web service, it gave me this error msg:

System.Data.SqlClient.SqlException: 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: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)

I have checked and ensure that the source is correct and the username and password is also correct I just don't know why the error keep appearing.

Hope you guys can help me solve the problem, thank you very much .

 

Where is the web service hosted. I'm assuming it is with discountasp along with your database. The web server and the database are on there own separate box but they are within the same network so you shouldn't have a problem with our web server finding our database server. Do you have a link so we can see the error message?