After my web hosting company separate the domain server and the SQL server, my application can't run anymore.

Could not load type 'Wrox.WebModules.Forums.Web.Controls.User.Header'.

I have tried to change all "localhost" to the new MS SQL server IP address, but still the above error exist. All module forum, polls, news show similar error message.

Appreciate suggestion and help.

Go here:
http://www.connectionstrings.com/

Click on SQL Server, then SqlConnection, then look at "Connect via an IP address".

If you use the SQL Client Connection utility you can set up Enterprise Manager and Query Analyzer on your computer to use that remote SQL Server.

Eric