Have you try to read the IMMO code with Maxisys? Do you have the IMMO code?
If you have the rest it's easy.
Just go to 17 - Instrument Panel---> Adaptations---> Chanel 21 or 1---> Put the number of keys that you need to code---> OK.
And then the IMMO Mil will stop blinking.
If you need any help, please inform.