Answer
when the purple barriar opens the other two i get trapped.
If I may ask what Guitar Hero is it;1,2,3 etc.. (Depending on which one it is may help find your problem). If it is wireless make sure you have the wireless adapter if it came with it if not you may have to buy a completely new controller.
Did the wireless guitar come with the adapter that you plug into the controller port on the actual console itself?