Do you have a schematic for the machine? When the ball goes into one of the kicker holes, it should close a switch that will activate the eject relay. If you've proved the kicker/eject solenoids work without the ball in the eject holes, then there might be an issue with one of the switches at the kicker holes. Check all the switches on the kicker holes to make sure they are clean and adjusted properly. Also, check the switches with the ball in the kicker holes to see how the switches are actually closing during game play...