2005 Hyundai accent 4 door. no remote key lock. The doors unlock when you turn the ignition key to on and they will not lock. When you try to lock them you can feel that they are still being told to unlock. The passenger side front door stays in what ever state it is in, locked or unlocked. The left hand door locks and unlocks all the doors except the passenger door when the ignition key is off. The right hand door will still lock and unlock the other doors if you cycle the lock button.\nWhat could cause this?