how can i fix my immobiliser ?

No, no-one can help as you haven't bothered to read either the car owners handbook or the instructions on how to post a question on this site
(Add all the detail you can. Include the item's name, make and model details. The more detail you add the more likely it is that others will be able to help you.)

Or do you really think all cars are the same?

not psychic
August 2009