I had the same problem with mine and it requires three fixes. First, you need to adjust the EOS switch. If that doesn't fix it you need to replace the upper flipper coil with the strongest coil possible. (I sold the game so I can't look at it for you but I think it had a green wrapper and was for an EM machine.) If those two fixes don't work, you will need to rebuild the flipper using the older style, non-linear flipper. The parts can be purchased from Pinball Resource.

In fact, upgrading all the coils and replacing the linear flippers dramatically improves the playability of the game. With a little luck you can even make it up the anti-gravilty ramp, through the volt-meter, and to the upper flipper.

The coils I used were A24-570/34-3600. It makes a huge difference. Also replace the coil sleeves and adjust the upper EOS switch.

You may need to adjust the EOS switch on the upper flipper to allow for a greater range of motion. This is what ultimately made it work for me.