I have a 1967 Midway Flying Saucer shooter. I think I have everything working but one thing. The game won't stop allowing me to take shots.I trip the 10 cent mechanism and a new game starts. For 10 cents you are supposed to get one play which is 25 shots. When I take 25 shots the game is supposed to end. I can keep taking shots until my arm gets tired. Any help would be appreciated.