I have started to have problems with the Magic Multi-Ball when the Lock lights comes on the ball will not lock and is directly released out of the Trap Door onto the play field. It does say first ball lock, but it does not stay lock. When the lock light comes on it stays on until the game ends with out locking any balls. I checked the Plate Assembly and its switches and they all work. Could it be something with the Trunk that is not working right that causes the balls not to lock. Because the balls never lock and the Trunk fails to spin to the Hypnotic side and to start a Multi-Ball. Is there something else that I have overlooked I would sure appreciate any help.