My Axiom Pro is working fine with all my projects except 1, why would this be. All settings appear to be the same
Some MIDI control events are saved in the song, check in the Settings → MIDI control box that if there are MIDI learn events that may be blocking the normal use of the keyboard.
Also if a track is not playing, does it play with using the screen keyboard instead? Perhaps the problem might be with the instrument on the track. Also make sure that the track is armed for recording by either all inputs or the specific Axiom MIDI keyboard input.
Flavio.