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
Link replace DOT
And spliced into ground and 12v constant
So I used 4 wires.

Diagram of the aftermarket controller :
Link replace DOT
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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