Hi, mine was doing this as well, but I took off the cover on the side of the seat (as you sit on the passenger, take the cover off the left side of the seat) and noticed a pin was missing that operated the sliding mechanism. If you take the cover off the opposite side on the drivers seat, you will see what it should look like and how it should work. I put a bolt in to make up for the missing pin, and now it works fine!!!
Chris Cotterill, November 2005