it's been a long time since i setup an SMF forum, so I don't remember how to change the title. but it's things like the title which have an influence on the content of the adsense ads. try to get the "gaming" keyword onto your pages as much as possible.
a very basic thing you could do is edit your namepros signature to be:
URL=http://www.rougecase.com]Gaming Forum and Gamer Community[/URL
( put square brackets [ at the beginning and the end as well ] )
Looking at the number of posts you have, this would instantly give you over 100 backlinks with relevant link anchor keywords.
again, i don't know much about the gaming community, but if there are other gaming forums which let you link to your forum, then you could join those forums and put a similar link in your signature, getting you more relevant backlinks, and at the same time let others know about your forum.
once you have a lot of backlinks, and a lot of traffic, you can then get into the nitty gritty of optimizing your ad placement e.t.c, but first comes the horse, then the cart
