hi, okay i just bought a guitar hero III the bundle. my xbox 360 system is modded with iextreme. the guitar in guitar hero III works fine until to the point when i start playing the actual game where u have to press the 5 buttons coming down at you. the button works in the menu but when i am playing the song, which u have to press the buttons at the right timing and all, it doesnt work. i returned my first guitar hero III to the store claiming it was defective and then i got an exchange, and the same thing happened. if anyone knows how to do this or have information to the solution of this.. please help me... becasue i dont think the store manager will let me get a refund on it, he seemed very pissed.