I have tried your suggestions and I have to say that the one thing that concerns me most is that the Midi Message LED never lights up. Could that mean a different issue?

I believe that I have the XP-30 set to 'Rx-Ch 1' and 'Tx-Ch 1' but am not sure if and how to confirm that the MKS-70 is set to midi channel 1. I am like an idiot with this MIDI technology as I have always been a guitar player. Anyway I can call you and run thru this over the phone? I don't want to i...

Many thanks, I will try that and let you know.

I have acquired a MKS-70 from a studio environment, I have no clue as to how MIDI works and I connected a Roland XP-30 to the MKS-70. What should I do (I am a MIDI novice) to confirm that the MKS-70 is working correctly? Have I connected the correct path? Should the MIDI MESSAGE light on the MKS-70 ...