Audi A2 Centralized Closing Problem

I have an Audi A2 that has no remote control, closes and opens with the key, when you close it only closes the driver's door and the alarm is not activated or the pilotite that carries at the door is activated, someone knows if he carries a switchboard and where does it take it Ubucada?
I have already reviewed the lock and those of Audi told me that it was the electronic box that carries with the same motor of the driver's door, I change it and continue doing the same.
Has anyone encountered with any case like this?
I would appreciate the answer thanks

Close or open this door when you drive the lock from the other door ?????