Printer starts printing 2 inches from top on the top of the paper

I have a HP Deskjet 3520 E-Print, and I'm using the printer as airprint, with my Macbook Air running on 10.8 OS. Everytime I try to print a 8.5x13" document, it starts printing after 2 inches from the margin and at the edge of the paper. 

Hope anyone can help me..

Also, when i try to use a cable instead of using airprint, it prints perfectly. both on letter and 8.5 x13" size.