95' RRC Alarm ECU re-programme

HI Guys,

Trying to fit a new alarm ECU to my car as the last one suffered water damage. off the top of my head its a AMR2106. Codes match from unit to unit but when i plug the new unit it - it doesnt turn over - am i missing something ?

Hi guys - Please can you help me! My rover tool ano expected dip the other day and i think the imboliser is the only thing is stopping it from surving at the mome moment! Ive got 2 boxes - one is iffy the other is new. The old one occasionally flashed/horns. The newone does nothing!

Helpppp