That sounds like it might be the problem. I can hear them click when I lock them down, but I have not looked over the back at them closely to see what is going on. At speed, one always popped up. But yesterday, with the great wind we had and another guy on board, we were able to push it fast enough to get the "good" rudder to pop up too. I will put it up on a trailer and see what is going on. Thanks for the ideas.