Midi messages not seen

Hello ,
I just purchased the pro version to use the midi triggers but i can’t make it work. I’m sending midi notes from Ableton Live to photon app (desktop) through the IAC driver Bus1 in mac. The bus shows up in sources in the midi mapping window but no message is detected or displayed in the monitor part.
I doubled checked with midi monitor to make sure the messages are correctly sent from Live and everything seems alright. For now I’m sending a note message ( pitch 60, velo. 127, 100ms).
Is there anything I’m doing correctly ?
Thanks in advance for your attention,