I have a stand-up mame machine running a KE-72 module with full joy support. I was keymapping specific games in mame32 with mame classic frontend. I did something during this time period and now when I press the tab key to bring up the key mapping function it does not work. I.E. the tab key does nothing when pressed. I cannot bring up the keymapping function. I tried resetting keys ect. Any ideas???