Quoted from RC_like_the_cola:Check for a setting called virtual locks, perhaps. Also, make sure that lock is lit. If you lock a ball and lock is not lit, it will drop the posts and release the ball.
Mine did the exact same thing. Check the plunged that pushes the lock posts up. There is supposed to be a bell cap mounted to the bottom of it with a spring and a screw. This is what catches on the latch thus holding the two posts up catching a ball. All of the parts for mine were laying in the bottom of my cabinet. It was really easy to put back together. I also put some loc tite on the screw to keep it secure. Hope this helps.
Brian