If you are connecting to myWindowsHosting.com Database:
This is most likely an error in your connection string. Please check your connection string against the one that's given in your hosting control panel -> Database Manager -> MSSQL Manager -> Connection String
If you are trying to connect to your OWN database:
Sorry, for performance reasons, we don't allow our customer to connect to remote database server. We suggest you simply make a backup of your database and restore it to our server to test your application. You’ll see a much faster performance and reliability using this method.
However, if you must connect to a remote database server, please consider upgrading to our Premium Plan or Semi Dedi Plan. We can enable remote connections in those plans.
And don't worry, we provide a 60 days FULL Money Back for all of our plans.