The auto-lock feature stopped working on my '02 Supercrew just a few days ago, which has worked as advertised since I've owned the truck as brand new - put it in gear, release breaks and viola!, all four doors lock like they're supposed to do. Now... nothing! Have to manually lock by hitting the button on the armrest. There is a procedure in the owner's manual to turn this feature on and off, but I get nowhere with that! Any suggestions? Thanks!