have you changed the battery in key fob?

Do you have a spare a fob?

If not and you may nedd to get it all reprogrammed. I had this on my car alarm meant I couldnt disarm the alarm or start the car and had to be trailored home from work.

Eventually got hold of a good company who advised me to send them the main alarm unit and the spare fob i had an they also included a second fob. The company then reprogrammed them all up and sent them back within two days