I am having a bit of a problem with the lens mount. It's a bit loose. I've pulled the leatherette up on the front of the camera, and I've loosened the four phillips screws. I can't get the deck to budge. I'm trying to get the top off of the camera right now. I've pulled off the speed selector and ASA dial. I can't seem to loosen up the film advance lever. I've put some tape around a pair of pliers and I've tried to work the know both ways but to no avail. Is there something I'm doing wrong.