Hermod+ Midi Out => Oxi Coral

Anyone using this setup with success? I have Oxi Coral, and it work with MIDI from Hapax, but now I want switch to Hermod+ and there is something wrong with it, when Oxi Coral receiving MIDI I see only red ring on it. I tested with new firmware, and also with previous.

Sorry, I already figured it out. I tried to send the MIDI signal using a regular patch cable.