I have an M Audio Oxygen v4 and am trying to map the midi controls. I use mostly Spitfire audio samples. I have mapped the Transport buttons that all work fine. I can map the faders and Mod wheel and they work with Spitfire for that session. I save the settings. However, after I have unplugged everything, when I go back to the saved Reaper session, transport buttons still work but not the fader and mod wheel saved settings. Can anyone help please? Thank you.