Forum Advanced Friendly URLs not working
 

Hi there, I am working setting up a new vBulletin 4.0 site. We had everything working and then our server host had some server issues and moved us to a new server.

With Advanced Friendly URLs turned on all links from the main forum page (forum.php) come up as 404's (File Not Found.)

If I turn it to Basic Friendly URL's it works fine...

How do we fix this? It was working fine before our host moved us to the new server.

Thanks!