BuddyPress.org

Greetings.
Sorry for bothering support, but i’m fighting with the problem from two days (and nights as well), read all the support topics about, and can not solute it…
I’m working with latest WPMU and BP, also latest.
I’m trying to make working BBpress included to BP.
I had uninstalled, reinstalled, and so then, all of the stuff. WPMU, BP, BBP…
When i’m trying to set up any group, everything goes perfect. Unless I check in the ‘enable forum’ option.
Next is screen ‘Imposible to find web page’.
If I set up group with ‘enable forum’ unticked, it goes with no problem.
When i click ‘Forums’ link on the main page, screen is the same ‘Imposible…’

Help please, cos i’m getting mad.
(-M)