Bernie, check;
1-Midi channels on both units must be the same. It’s like a phone line, the same line/channel.
2-If your other unit worked well than the Kn7 midi out put must be changed.
3-Make sure it is midi out from your Kn7 and midi in on the other unit.

It has been a long time since I played with midi – it was never what they told you, it was what they did not say that got me confused.

Hope this helps my friend, John C.