I have just had my 2 feyfobs repaired and one of them is still not working. It's Red LED flashes which must mean the battery is good but it will not open/lock the car. I was told that the fob may need to be re-syncronised by putting it in the ignition and switching it on and the pressing the button about 2-3 times (which should lock/unlock the central locking). I tried this method 3 times over this morning and sadly it still does not operate as it should. Could there be any other reasons for this? All three microswitches click like new.
Got the same problem,tried everything including checking for lose wires etc,great job done by Martin,can fully recommend.
As above the keys used to work,but now zilch!
Even when pushing the drivers door knob down does not lock off the rest of car,getting really frustrated............Grrrrrrrr 
Nowt to do with the key then ... either the contact in the drivers door servo motor or the central locking control unit.
Check the control unit has not come unplugged ..
Removal2 Remove the trim panel from the right-hand
front footwell.
3 Release the catch and disconnect the
wiring from the bottom of the control unit.
4 Unscrew the mounting nuts and remove the
control unit from the vehicle.
Refitting
5 Refitting is a reversal of removal, but tighten
the mounting nuts securely.
and check the wires as they go from the body through the door ... not unheard of to chafe and suffer damage ..
