Thanks for the link Eric. Unfortunately the serial number in my MX 700 looks like RO3.1.5VX4 but was not accepted as being valid so I was unable to register it.

I have had it for 5 or so years now but it looks like I'm in limbo :-(

All made worse because I seem to have lost communication between the remote & PC and cannot find out what is wrong (the cord is ok with conbtinuous links to GND, TD & RD.

ANY help most appreciated.

John