Installing both sitewide and group level forums in buddypress

I have a wordpress buddypress social theme single installation.
http://mycraftdecor.com/plainbuddy1
I have went to the Forum section of Buddypress and activated / installed the forums (sitewide as well as group specific forums ). Further I don't know if they are working or not. They don't seem to work because I'm unable to create any topic from the front-end. I don't see any forum section in a group's sub-nav (like Invites, Group Docs etc...). Please explain how to fix it / use it.
~ayaz.K