Here is a link to my forums:
http://www.bodyartforms.com/forumsV9/RedirectForumToChat.Aspx?ForumId=3

I'm not sure why this error is coming up. I've tried installing the forums on my site root, and now I've moved them under  Forums, turned it into a virtual application directory and I still get the same error. Ideas? I'd really like to try out this chat program.