Problems and questions

[T-Dot]

I have google ads on my site. However, the my site is a membership community, so I'm assuming, the googlebots can't see the content because the need for php session cookies. This is causing the google ads to be totally irrelevant to the content of my site. How can I fix this? Can I specifically ask for a certain type of content from google? I figured out that if I put some content before the secure script is called, robots will pick that up. If I was to make invisible content to the viewer but the robots could see it, would that get me in trouble if the content IS the exact same visible content that is viewable in the protected part of the page? I'm thinking of using <!-- -->, or font same color as background, or any other idea I can come across.

[Ruick]

is this a phpbb forum? default forums like those start off with really bad seo, and for example googlebot isnt able to put up all the threads. When i had a few phpbb sites i remember reading phpbb mods which would make it much easier for googebot to index the individual threads, google for removing session ids and such because i dont remember the link offhand. For now puting in a paragraph "explaining" your site to spiders would be a good idea.