LoL You should of use a Upgrade alarm.

Retain your original remotes without stuffing around with factory locking.

After market Actuators work on a basic alternating one wire positive one wire negative pulse. Most OEM wiring central locking don't really work on this basis because like in the S2K the Central locking module has dome light hooked into it, and other features like so. (To much to get into).

Uprading is the smart option. The next smartest option would be using kill switch system aswell with/without immobilisers.