I don't know where to start. When I try to go into input and config, it won't even allow me to set the triggers on my gun. I have no problems in Mame using my light guns, but I can't config in Demul. When I try to use the service button, it just adds coins and the buttons aren't duplicated. How can I get my light guns to work? I've been aching to play Ninja Assault, but it doesn't allow any kind of mouse input. Also how do you make it full screen, because when I select full screen it does nothing.