Aftermarket remote control unit for existing central locking

Hey I have a n15 with central locking by key, I'm trying to wire up an aftermarket remote control unit to the existing central locking, I got it semi working the the buttons on the remote will lock for a brief second then unlock again, hoping someone can help me out.
Wired it up to this:
Link replace DOT
obrazki.elektrodaDOTpl/8566796900_1311614003.jpg
Link replace DOT
obrazki.elektrodaDOTpl/1491521100_1311014045.jpg
And spliced into ground and 12v constant
So I used 4 wires.

Diagram of the aftermarket controller :
Link replace DOT
cdn.thgDOTdk/DAT/files/40725_DK_GB_user_guide.pdf
 
Believe it or not I had it wired up correctly, I was just testing it with my door open . So it's all working now hahah
 
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