Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)
I think I used this one: http://bees4honey.com/blog/tutorial/how-to-add-iad-banner-in-iphoneipad-app/
But I can say with confidence that you didn't follow the tutorial correcty or you didn't read comments on the tutorial to check for errors.
How did it not work?