Thanks for the advice Phil but no joy!
I have made sure that the Beo4 is always in 'DVD' mode. When I press stop it pauses, stop again and it stops, press and hold a third time and nothing happens (other than a cross appearing on screen to signify that the command is not applicable).
Any other suggestions chaps?
32" RF VCR Avant, 2 x 28" VCR Avant, DVD1, Beocom 6000, Beo5, A9 Keyring!