Ok, I think I fixed most of the issues. We had added files which I think was interfering. VB tech support has been poor at best as I've been in contact with them.
My question is: I still don't think the correct messages are coming up.
Go to:
http://racerhub.com/forum/memberlist.php
When you do that (and you're not logged in), you get a banned message. This should be a message that you should login. Is this supposed to happen?