I just purchased a Coleman Niagara highwall and when we brought it home the electric lift worked fine.!I was out today and noticed I would. It raise. I tried using the manual jack and it would spin about 1/4 turn and stop. I pulled the cover off the tree. Everything looked ok, no loose cables. However this metal piece on the tree turns about 1/4 and hits the bottom of the camper. Why could be the problem?