Hi Paul

First check your Micro is set to send on channel 1 on the midi out.

1. Select Global
2. Press the Menu button
3. Select Midi out using the buttons on the right
4. Using the +/- buttons find the MidiOut Chan
5. Select Channel 1 Using the buttons on the left
6. Using the +/- buttons scroll until you find the Chord setting
(Its the last setting)
7. Press the write button
8. Press Enter to accept settings.

The Harmony M is set to Channel 1 out of the factory.

The Chord setting on the Micro allows you to send info to the micro when the lower voice is muted.

When midi signals are being recieved a LED flashes to the bottom right of the preset number when you press a key in the lower section of the keyboard.

Regards

Col