Make sure you hit POST on the track. If POST is not lit up blue, Melodyne will bypass ProChannel. This gave me trouble until I figured it out.
The POST button is almost top center under the GAIN knob in the Inspector when TRACK is selected. You may have to click TRACK a second time to hide the Properties: otherwise, the POST button will be hidden underneath the Properties. Not a good design, in my opinion, but not a problem once you know where it is.
Let me know if you have trouble and we will figure it out.
PS You are an interesting songwriter. I enjoyed your Facebook music video.