How do I make Digistix work with MidiGuitar2?

I have loaded Digistix as an auv3 plugin instrument into Midiguitar 2 where the default piano and synths are, and i get no result.

If i exit midiguitar and use midi output I can get digistix to receive midi and output audio directly while digistix is open, but inside midiguitar2, im not sure if its not getting the midi signal, or if its not outputting the audio.

Any ideas.

Ultimateley im using midiguitar inside AUM so if I have to load them in there somehow thats fine too, but any ideas how to make them play with eachother?