Irrelivant home-page ad’s

Hey guys, first time posting on this site, I hope i’m in the right area of the forum.
Anyway, on my site http://www.buying-a-mobile-phone.com/ on the main page I have semi-irrelivent ads of ‘mobile blogging’, but on the review / archives pages, the ad’s are relivent, even though the content is almost identical.
Any suggestions how to make the index ad’s relevant? Thanks

Original post by Mikesblank