Discovery 2 Central Locking issues

Hi all, I haven't found a post asking what I need to know, for some reason my drivers door is the only door I can get open at the moment!!

I cannot open the passenger side door the rear doors or the rear tailgate.

they all lock when you press the lock button but when you hit open there is no joy at all, they do not even attempt to move, someone has suggested that it is likely to be the DRIVERS SIDE FRONT door locking mechanism? apparently this opens then sends a signal to all the other locks to open as well when needed?

if anyone else has any more advice that would be a great help.

also if anyone has a link for a website where I could buy a new lock mechanism/actuator that would be great.

many thanks in advance.

do they unlock from the switch on the dash? ...and by the way did you try to press the fob twice? cos if it's set on SPE(single point entry) the other doors will open just on the second command

L.E. that theory with the driver's door lock opening the others is wrong