DISCONNECT IMOBILISER?

MY CBR900RR ALARM AND IMOBOLISER WILL NOT DIS ARM. IT HAS BEING PARKED UP OVER THE WINTER AND WILL NOT WORK NOW I TRIED NEW BATTERY IN THE KEY FOB AND IT IS STILL NOT WORKING
IT IS FROM ITM SECURITY META M351A VERSION
I HAVE ALL THE PAPER WORK WITH IT WHEN IT WAS FITTED
ITM SECURITY SAY IT HAS CODE HOPED AND CAN NOT BE REPAIRED
DO YOU KNOW HOW I CAN DISCONNECT THE SYSTEM FROM THE MOTORCYCLE