I recently added a rock and roll bed to my camper conversion but had to take it apart to get it in the van. I've bolted it back together as it came but it doesnt seem to want to fold back up from inside. I can pull the side of it from the rear and it folds normally but doesnt want to using the seat belts/knee push method from inside. Is there something I've not put back in the right place? Do the seat belts do anything in particular to make it easier?