Thanks Bill & Jørgen,
Everything is in place, everything works EXCEPT the KN7000 does not send midi messages to the PC that are recognised by the software. The PC does play midis on the KN7000 though. My conclusion is that the midi driver for the KN7000 is now out of date within Vista, and there is no way now of getting a revised one.
I will have to abandon the project and start again with the Tyros 2 and see whether I can get two way communication with that keyboard. The other alternative is to scrap Vista and use Windows XP as I earlier had all this working under XP.
Keith