Hmm...did you try plugging it into a different USB port at the back of your computer?
Did this happen spontaneously or did you always have these problems with it?
Try the gamepad on another computer if possible and see if the problem is still there.
Remove the gamepad from control panel and get it to look for it again.
Reinstall the software.
Re-calibrate the gamepad.
Try another game and see if it does the same thing.
Tell me if you get it fixed!