Tempest: Looking at your profiles GameEx.ini [Default] P1_COIN=,False,49,49,49,49,False P1_START=,False,49,49,49,49,False P1_BUTTON1=,False,49,49,49,49,False P1_BUTTON2=,False,49,49,49,49,False P1_BUTTON3=,False,49,49,49,49,False P1_BUTTON4=,False,49,49,49,49,False P1_BUTTON5=,False,49,49,49,49,False P1_BUTTON6=,False,49,49,49,49,False P1_BUTTON7=,False,49,49,49,49,False P1_TRACKBALL=,False,49,49,49,49,False P1_CUSTOM1=,True,49,0,49,0,False P1_CUSTOM2=,True,49,49,0,0,False P1_CUSTOM3=,False,49,49,49,49,False P1_CUSTOM4=,True,49,0,0,49,False P1_CUSTOM5=,True,49,0,0,49,False P2_COIN=,False,49,49,49,49,False P2_START=,False,49,49,49,49,False P2_BUTTON1=,False,49,49,49,49,False P2_BUTTON2=,False,49,49,49,49,False P2_BUTTON3=,False,49,49,49,49,False P2_BUTTON4=,False,49,49,49,49,False P2_BUTTON5=,False,49,49,49,49,False P2_BUTTON6=,False,49,49,49,49,False P2_BUTTON7=,False,49,49,49,49,False P2_BUTTON8=,False,49,49,49,49,False P1_BUTTON8=,False,49,49,49,49,False The only LED's you have lit up are P1_CUSTOM1, P1_CUSTOM2, P1_CUSTOM4 and P1_CUSTOM5. So that explains why they're not lighting up properly there. You MAME.ini only has P1_CUSTOM4 and P1_CUSTOM5 lit up. [Default] P1_CUSTOM2=,False,49,49,0,0,False P1_CUSTOM1=,False,49,0,49,0,False P1_CUSTOM4=,True,49,0,49,0,False P1_CUSTOM5=,True,49,0,49,0,False Going by your two profiles here you don't have your LED's lit up correctly. Remember the "State" tickbox is whether or not to light up an LED. Glad to hear the plugin isn't causing the crashing. Tom removed the latest version from the GameEx install because of your post about that.