[systemexclusive]

Originally Posted by Mad Genius Records

I'd like just that extra bit of flexibility in using tangible knobs to adjust parameters in the plugins. Any ideas? M-Audio instructed me to recall Preset 09 on the controller, and then to find Machine Control under Peripherals in PT, and to enable Slave mode. The transport worked then, but assigning parameters stopped working.

I would recommend you to use Enigma Librarian\Editor for M-Audio MIDI keyboards. Backup your device memory and start to design new Oxygen preset from scratch.
Use "s n o i z e : MIDI Monitor" software to see which MIDI CCs you controller sends to DAW when you turn knob or touch fader.
Try to setup new Pro Tools session just for tuning yours Oxygen preset.
Once you get everything working properly - switch back to you mix.