I have a 325 1994 convertible automatic. Recently the automatic convertible top will not completely go back up. It goes through all the right steps then before the ragtop comes down in the back the rear deck should come down but it doesn't. That is, the from a down postion back "deck" comes up, the ragtop un-folds completely up to the front latch, then the rear of the top folds up but the deck doesn't fold down after it. Any ideas?