Why wont Renault clio 2002 start key fob doesn't appear to deactivate immobilizer?

YOU NEED TO BUY A NEW KEY OB I HADE THE SAME PROBLEM COST ME 148 POUND TO REPAIR FROM RENAULT YOU NEED TO BUY A NEW KEY OB I HADE THE SAME PROBLEM COST ME 148 POUND TO REPAIR FROM RENAULT YOU NEED TO BUY A NEW KEY OB I HADE THE SAME PROBLEM COST ME 148 POUND TO REPAIR FROM RENAULT