I hope that you might be able to help with an ACT Controller assignment.  I have an M-Audio Oxygen61 keyboard and I have successfully set it up as an ACT Controller.  I have a plugin that has one parameter that is an on/off button.  I was able to set a key on the keyboard (C2) to the on/off parameter, but when I press the key the plugin stays on.  The results I'm looking for instead is that the plugin parameter is on while the key is pressed, and turns off when I release the key.
 
How do I accomplish this in the setup?  Thanks in advance.

The answer on that question depends from the method you try to use:
a) you setup "Cakewalk ACT MIDI" control surface plug-in and you have MIDI learned some button there. Then you try to "ACT Learn" some VST plug-in control. In this case your button should function as a toggle, that is the logic inside "Cakewalk ACT MIDI". Even in case you switch between momentary/toggle mode in hardware preset
b) you just let the button send MIDI directly into your plug-in, so without ACT. And you have "MIDI learned" it inside plug-in. But for some reason it does not work what you want.
 
In case of (a), try relearn your button as a fader/knob inside "CW ACT MIDI" and then "ACT Learn" it again in VST.
 
In case of (b), let us know the plug-in/parameter in question.