How can I remove adsense specific forums?

[Alan_SP]

You need to wrap ad code in this:

<if condition="!in_array($GLOBALS[forumid], array(1,2,3,4))>

1,2,3,4 are forumIDs where you DON'T want ads. You can use as many as you need.

Ad code goes between this and </if> (don't forget to end if condition).

You need to wrap all your ad code with same if condition.