Hello from Norway
Quick reply:
1) You got to many subject/departments on the forum. Slice it down and make it more comprehensive.
2) You need to get up the activity. Whenever I see a Forum with few posting, I always leave because I think that this forum has nothing to give me. In other words - get your friends to start posting.
Good luck!
See you - Umbraco
http://umbraco.secondbrain.com/collections/739127