Hi @sozinizos. Welcome to the forum. Note that you can find a Scaler 3 DAW MIDI routing guide on the forum’s Documents and Resources page which includes instructions for Ableton Live. So have a read through and make sure you have things configured correctly
Make sure to use the VST, not the AU version of Scaler 3. And make sure you have Scaler 3 set as both the ‘MIDI From’ device and channel on the recipient track.