"Data Source=.\SQLExpress;Persist Security Info=True;Integrated Security=SSPI;Initial Catalog=YourUserId_DatabaseName"
Like you see .\SQLExepress - it's local name SQLEXPRESS Server. This means that the name cannot connect to the SQL Server via the Internet.
And the ASPSPIDER.COM does not give the address of the SQL Server.
You can load and unload the database file through the web control panel, and then attach or detach the database through the web panel.
To use SQL Server Management Studio will not work.