Hi there, I have a 2001 Boxster and as I put the top up it seemed the motor was having a difficult time moving the top up, like it was binding somewhere. The top is up but the clamshell is still up and stuck open with the left side higher than the right side. The motor is still working but the top will only move slightly up and down when I push the button up and down. Any thoughts on how to correct this? Thanks