DOREMiDi MIDI Thru TRS Box (MTR-5) not passing MIDI

Hello, comrades!

I'm having issue with my DOREMiDi MIDI Thru TRS Box (MTR-5). I cannot get MIDI data to pass through to my device.

The Setup:

· I've tried this with two different units (synth and sound module).

· I've tested with two different TRS cables.

· I've set the DIP switches on the unit to both Type A and Type B configurations.

The Problem:

Regardless of the settings or cables used, my receiving devices (synthesizer and sound module) do not see any MIDI commands.

My Suspicion:

I've had a similar issue before with the Chase Bliss pedal, In Doremidi manual the recommended DIP switch settings for Ring/Tip Active were incorrect. I'm wondering if the pinout (Type A / Type B) documented in the DOREMiDi manual might also be wrong.

Has anyone else here successfully used this specific DOREMiDi box? If so, what was your DIP switch setting for type A and B.

Any help would be greatly appreciated!