Does it work with the key in the door but just not with the remote? if so try reprogramming your key remote, get in the car close the drivers door, turn on the ignition till the dash lights are on but don't start the engine, press the remote buttons open close open close, if this has worked you should hear clunk clunk, and the doors should lock and open once by themselves, turn off the ignition and remove the key before opening the door. If you have no joy most likely it will be the remote battery dead, or the connections inside the key remote battery cage where it connects to the circuit board, they're tricky to solder, to be honest sometimes a folded up fag paper between the battery and outer case of the key does the trick( mine has been like that for 2 years with no problems).
Spannermonkey, May 2010