My doors won't unlock, any of them, on my 99 Mercury Mountaineer. I have a remote starter fob as well as one that came with the car. If I push the lock buttons (either side)on inside of car nothing happens. They do however lock with fobs and buttons. I have a keyless entry pad and that is how I have to unlock the car. Another thing that does not work is the chime for when the lights are on and they key is removed from the system. Could this be related? Thanks.