Playing external synth using Analog Keys

I’m trying to play the Novation Circuit Tracks synths (MIDI channel 1 and 2) using the AK keyboard. I have followed this video to turned on MIDI out on the AK https://m.youtube.com/watch?v=9fy67sxxXqY

But playing the sequencer with track 1 (MIDI channel 1) selected on the AK and trying the keybed on the AK nothing triggers the Circuit. I have tested with other MIDI controllers set the MiIDI channel 1 and they tigger notes on the circuit without a problem.