how can i put adsense as a post on every page in my forum?

[VBUsers]

i had a hack for 3.5 but i cant seem to get one that works properly. i want to add my adsense as a post on every page after the 1st top post. i have 3.6.0 installed and need this as soon as yesterday. let me know who can help.

anyone ? i need this to be after every 1st post only of all the pages.