I have bought a 1991 4ltr Sovereign. It has a few problems, none serious but the one thats bugging me is the alarm key fob. It is one of the single button fobs with a Jaguar head on it in gold. I have tried all the various ways to re-program it to the Jaguar but nothing seems to work. I tried the "open the boot and drivers door, insert key and press internal central lock switch 5 times, alarm will beep etc", it doesn't. I tried "turn the key to II then to ON 5 times, alarm will beep, press remote", it doesn't....... Has anyone any ideas, as I would love to get the central locking and alarm working. Thanks in anticipation.