Guys\Jack, sorted, before i saw your post Jack, (you were on the right lines) i had been reading posts on lots of other sites with similar problems. it all has something to do with a Hall Effect Sensor. it detects the door open and stops you from locking it, trouble is when you shut the door it still thinks its open so wont operate the lock/unlock , Fix is simple. remove the 3 connectors from the switch bank on the door for the windows and mirrors, and push them back in and out and in etc and hey presto, it will suddenly start working, then dont touch it and put it all back. Thanks Rich