Fairlight-CMI

Ok, I'm having problems using my Series III keyboard as a master/controller keyboard. I have all the relevant connections to and from my MIDEX 8's. I can control the Fairlight from Cubase, ie it receives MIDI information, but it won't send any information from the Fairlight to Cubase. My other two keyboards (XTk & AN1x) work just fine.

I've fiddled with the MIDI Port (A-D) and various other relevant settings, but this makes no difference.

Is there something unique to the Fairlight regarding MIDI or should it just work as any other MIDI controller keyboard?

Any help is greatly appreciated, as usual :-)

Cheers,
Peter