Is there a way to reset doors locking/unlocking , when i unlock the car using the keyfob all 4 doors and boot unlock , when i pull away the doors all lock as there supposed to , if a front passenger opens or unlocks his door he unlocks all 4 doors but if i unlock my door it doesn't unlock any other doors this is a pain if i need to open a rear door , they used to all open so have i done anything to mess the system up , the childlocks are not on ,any advice would be greatly appreciated, Lino