I am currently experimenting with Software instruments/Plugins in Pro Tools,
I have a mono Aux Channel with Reason's ReWire plugin and a MIDI Track Playing the NN-19 Module in Reason, A stereo Aux Track with the Moog V plugin and a MIDI Track playing the Moog V.

My problem is that when I have both the REwire plugin and the Moog Plugin in the same session I cannot play the Moog V or any reason module via Midi from my Korg but if I only have one of the plugins in my session I can play it via MIDI from my Korg.

Can anyone shed any light on this?