Microphone doesn't work with Mixon 4 using djay Pro on Mac.

Hi guys

I have purchased djay Pro for Mac, and I am using it with Mixon 4. I love it, but I can’t select Mixon 4 as a microphone input? There is a microphone input on the front of the Mixon, but unfortunately no matter what I try I can’t hear the microphone, or select it via preferences.

Please help?

Thank you a lot in advance.