Hi Vic
I use SONAR and mi.1. I recommend installing the newest BandLab Cakewalk too.
If that is difficult, I suggest using
MIDIberry-IO mi.1. It supports bi-directional communication, unlike MIDIberry.
To use it, you need to add two virtual MIDI ports using loopMIDI.
http://newbodyfresher.linclip.com/midiberry-io-mi1
I have confirmed that it works properly with SONAR Producer v8.5. I hope that Sonar Producer v8.3.1 will also work.
Regards,
linclip