Controlling a Digitone's Midi tracks from Logic (With OB)

Hey there guys.

I’m trying to control the 4 external Midi tracks on my Digitone from Overbridge
using a midi keyboard.
I can sequence my prophet from the Digitone just fine, and also have no problem playing the Digitone synth tracks using my keyboard (tracks 1-4). It’s just that when I select the corresponding midi channel on my board to control the 4 External midi tracks, I have no luck.

Am I doing something wrong or is this just not possible using Overbridge?

Thanks to anyone who can give me some advice!