I found the stupid working solution.. it’s a little bit illogical but worked 100%
1 – Delete your group.. doing the other way around is impossible for non-developers.
2 – Create a the new group..
STEP 1 add title and description ( title will be used as the group slug )
STEP 2 ( DO NOT SAVE SETTING AS IS!! I REPEAT DO NOT!!!! ) here’s what to do.
in step 2 ((un-check)) the Enable discussion forums, and then check it again.. and THEN save settings..
Step 3 avatar bla bla.. but the thing is
it’s solved!
How it works!
the problem is stupidly simple.. that in some times.. ( not all buddypress installations for some weird reason either plugin conflict or a script timing error…
the check of enable forums is saved as “null” instead of 0/1 imagine it as a multiple choice radio button..
as long as you didn’t either.. it’s unselected.. but once you click.. it’s always 1 of the both and can’t be null…
Why is this happening? even WPMU and BPMU geniuses couldn’t solve it for 2 years now ^__^’>