I've basically got an arcade machine with a pc tower in the bottom a pc screen behind the glass, the controls are proper arcade machine controls. The cable from the controls goes into a little circuit board then there's a cable coming from that that you plug into the keyboard port on the mobo. With the arcade machine controls plugged in it won't let us add credits which it used to do by pressing select and enter. With a normal keyboard plugged in by pressing number 5 I can add credits, I do this but as soon as I put the arcade machine controls so I can play it with the analogue sticks etc a screen comes up saying tilt then it just goes back to the game screen saying insert credits?