Hi, Looking at your project file, it looks like all of your current mappings are MIDI to keystroke. This would be difficult with fader movements. I suggest that instead you set up Adobe Audition to recognize MIDI HUI as described in the below link. Then I should be able to help you get the fader working.
https://helpx.adobe.com/audition/using/control-surface-support.html
Steve Caldwell
Bome Q and A Moderator and
Independent Bome Consultant/Specialist
bome@sniz.biz