Hi, as far as I can read you are doing everything right to make this tool
work in Sonar.
I can just guess that the Origin midi guitar is also a midi plug-in,
so it is possible that you can "see" it under the midi fx ?
Another guess:
You need to open an audio track in your DAW and use MIDI guitar as an instrument. Within the MIDI guitar settings you set the output to a seperate MIDI track. But this you tried and it´s not possible to do,or?
Is this tool working as a standalone in your studio, cause all demo´s I found seem to show this plug as a standalone!
This plug-in seems to be very revolutionary and has a good sound,
interesting for me if it works!
Sorry that I couldn´t help anymore.
Pragi