I have a Dr. Who which is too easy to lock the balls on the time expander. There is a target in the center of the time expander that says 'Lite Lock', however, the locks are always lit and the target doesn't seem to do anything other than register for points. A friend of mine has a Dr. Who and you have to hit the target to light the locks. How on earth do you set the machine to the setting where the target lights the lock? I can't find it anywhere in the 'Feature' or 'Standard' adjustments.