Ok here goes, i hope this makes sense and helps.
Step one open door
Step two:
Using ya key fob or something, push the locking mech latch forward, all they way, like it would close when you are double locking from the key fob, once it clicks all the way forward you know its far enough.
Step three:
Look down the gap, inside there is a 3mm copper contact plate on the back of the lock latch, kinda hard to explain but you will see it if its not covered in dirt etc, take a cloth and clean all the inside, clean the contact points and everything, removing all the dirt and greece etc.
Step four:
Release double locking by pulling the inside door lever.
Repeat on all doors.
Step