Having a problem with my door locks. I have the mode set to 4 on the security of the car which I think is standard amongst most. I have a 2 door 2002 Pontiac Grand Prix GTP and when I lock the doors, the passenger side doesn't lock. The alarm system does activate but you can still get in the passenger side. When I unlock the doors, it works and it also locks when you put the car in to drive. Any ideas would be appreciated