Hi Tracey, try this method to re-syncronise the fob with the car,
Fasten seat belts and close all doors
turn ignition switch from position l to pos ll 4 times in 6 seconds
turn ignition to pos l
programming mode activated for 10 seconds
press and hold any of the buttons on the fob
wait for an acoustic beep (indicates correct programming)
repeat for any other keys within 10 seconds
to exit programming mode
turn ignition to pos lll or wait 10 seconds
nigel, June 2008