If you totally run up against a wall, you could convert to threads - all threads would need to do to bring all your members/posts/forums over is to read your old files. Personally I'd fix classic first and then consider moving to threads when 7 is out <img src="https://www.ubbcentral.com/boards/images/graemlins/smile.gif" alt="" />
If you totally can't figure it out, pm me access details and I'll take a look at it for you. Start with looking at your error logs and see if a clue is there. I'd agree with Gizmo tho that it sounds like a mapping error. Does your old forum still work?
