ball stuck in coupler

I just brought home my new andersen ultimate hitch all hooked up. No problems getting home, but after releasing lock handle and raising the trailer, the ball is struck in the coupler. The truck is pulled up while raising the landing gear. I thought the bar that slides into the coupler block was not releasing, but I unscrewed the connection from the coupler so that was not the problem. The ball is just struck. Any thoughts from andersen hitch owners.