Preston, the control unit is behind the trim on the drivers side footwell, it might be worth a check on the connector to look for corroded connections, after fitting a new battery to the key fob, you have to re-syncronise it too the car,
Switch ignition ON (not start) 4 times within 6 seconds
Switch ignition OFF & remove the key
Programming mode active for 10 sec's (a beep will sound)
Press and release any button on fob (beep will sound)
To exit programming
Switch ign ON or wait 20 sec's
nigel
February 2010