i bought nba 2k10 today on steam. i installed it and my xbox360 controller for windows (wired) doesnt work in it

in the controller settings i only see mouse/keyboard and no button works.
i tried everything, and i am not a pc noob...the controller works in every other game.
it is detected alright by windows.
my system is windows 7 x32.
please help me i wanna play that game!