bbPress.org

Its always hard to track what you missed as compared to a fresh procedure. If you are doing fresh installations of both then I would want you to take a look at my tutorial that I wrote yesterday : http://blog.ashfame.com/2009/07/integrate-bbpress-10-with-wordpress-28/

and if they already hold data, then we will try to trace the cause and get it fixed.

Hope that helps!