Hey barryfell,
If you are behind Cubase ATM, could you snap a screen of your Editor settings as well as your channel inspector settings?
There must be something I am missing or that I have set wrong. I couldn’t seem to get an instrument track to send midi back to the hardware. I could only seem to do this when creating a separate midi track. There seems to be so many ways to run this thing but I would like to do it the way you are describing if it’s working good for you.