I had one that I put in a new selector board, still didn't work, So I put the old board back in, and it worked. Can't explain that...... but are you sure that your selector is saving the setup, if it is not saving properly, and you have a bad door lock the car will stop as soon as it tries to leave the floor. I also agree with scott check your limit switches for proper electrical operation. Good luck. let us know what you find.
