google adsence and private forums?
 

I'm having serious problems with my integrated vbulletin/adsence.

I run a "private" forum, users has to log in to the forum to read any of the forums.

My ads show up, but they show crap-ads.
I guess that the script can't access the posts to figure out what's written, and therefore show "defualt ads"?

How can I make google read the posts?