I have a DE Simpsons. The rules say to get the jackpot you have to get a 3 ball multiball going and knock down the 3 pin targets. That is supposed to light the jackpot on the ramp. Shoot the ramp to get the jackpot. But when I knock down the 3 pin targets during 3 ball multiball it doesn't light the jackpot. And doesn't do anything special if I hit the ramp after that. I don't see anything in the settings to turn it off. Anyone have any idea why I'm not getting the jackpot?