2002 Rover 25

2002 Rover 25

fOR THE SECOND TIME IN A YEAR, THE ALARM SYSTEM IS PLAYING UP. IT ALLOWS ME TO UNLOCK THE CAR BUT WHEN I ATTEMPT TO START IT, THE ALARM BEEPS AND IMMOBILISES IT. THIS SUDDENLY OCCURS. LAST TIME I CHANGED THE BATTERY IN THE HANDSET TO NO AVAIL AND HAD TO CALL SOMEONE OUT. I ENDED UP WITH THEM RESETTING THE SYSTEM AND PROVIDING NEW KEYS. TWICE IN A YEAR WOULD TEND TO INDICATE A PROBLEM WITH THE SYSTEM SURELY.
ANY IDEAS