Crossfire appears in a windows mode when i play, HELP!!

Well, when i start the game in full screen mode, the game appears in the left high corner of the screen at window mode, and i cant play good, i put here a link with a screenshot of my problem:

http://imageshack.us/photo/my-images/41/crossfireerrorwindowedm.jpg/

My card is a nvidia 400 GT, and I got all the drivers, and my operative system is Windows 7 Ultime x32 bits.

Edit: Lol.. Kratonic, that dont work, and it is in full screen mode