Reply to numark mixtrack pro problems

hey guy's... just recently brought a numark mixtrack pro with traktor Le and everything is sorta working... Ive installed asio4all just as the Manuel said and yet when in traktor in the audio preferences, i set the audio device to asio4all in in the asio4all option's i set everything on ( realtek and usb midi device) ( i have a midi piano usb and even unplugged it still remains in the Asio options) and yet still no sound comes out of the back jack's of the mixtrack or no noise out of the front headphone jack.... PLEASE HELP ( RUNNING: windows XP)