Arduino receives MIDI but doesn't send

I am trying to control my MS70-CDR from my Midi controller via an arduino MIDI to USB host adapter. The arduino is blinking that it is receiving the message from my MIDI pedal, but it is not sending a message to the Zoom. I think there is a fault in the sketch I am using (the default USB MIDI omnidirectional control sketch that comes with USB host code). My Midi controller is sending PC commands on channel 1.

Does anyone have a better sketch to receive legacy MIDI and send USB MIDI? Below are the parts I used.
r.ebay.com/BDEQ8D
r.ebay.com/QLVRYs
r.ebay.com/zmJ5I3