Opel Corsa-C 2006 1.2 BCM Replacement Issue

Hi all.
Got a Corsa-C 2006 model 1.2 engine, having to replace BCM because indicators playing up.
Already replaced yellow indicator relay, customer got second hand BCM from ebay and he said it is virginised.
I put OP-COM went into BCM to reset but it still asks for security code.
I have security code for original BCM off the car but this will not work with second hand BCM.
How do i program BCM to make the car to start?
Any help appreciated.
Cheers.
Tony