Land Rover Repair: door locks, land rover range rover, rover range rover

Question
We own a 1999 Land Rover Range Rover and have had the strangest problem with the door locks.  They lock/unlock constantly while driving or even while the car is sitting in the garage.  We can never leave a key inside the car even to purchase gas since we could be locked out at any time.  I can no longer open the tailgate because even when I've unlocked the doors by any means, they relock themselves prior to opening the tailgate.  The dealership replaced a couple of the locks which seemed to solve the problem for a very short time (maybe a week).  Any suggestions as to what to do next? Thanks for any help you can provide.
Sharon

Answer
My guess would have been the same as the dealer - the latches.  Other problem areas could be the RF receiver, or the BECM itself.  You are going to have to begin disconnecting those pieces and driving the car.  You can also disconnect the front door locks from the BECM and isolate them.  It will be one of those four things, I think