Technical fiat stilo reprogramme keys how?

[kitkatje]

My daughter has just got a 2002 fiat stilo 1.2 6 speed car. The car should have remote locking but this isn't working. l have replaced the batteries in the keys and the light comes on in the key when l press it but do l have to reprogramme it to the car and if so how do l do it or is it a job for the garage.
Thanks.

 

[T14086]

needs to go to dealership, take all keys and proof of ownership.