Jamstix and N w/ MIDI  and "Live" jamming

I hadn’t actually tried this until now. Using an external ‘dumb’ keyboard/MIDI controller, where the sound is either generated by a soundfont or a VSTi, and attempting to have jamstix driven by this output. If I choose to have the MIDI output routed to jamstix, I get no sound. If I route the output to the soundcard’s (SBLIVE) synth, jamstix doesn’t track. I’m trying to use this in a ‘live’ situation, just to jam and get ideas. Any thoughts on making this work in N? Is there a way to make a MIDI track route to multiple outputs, one being a soundcard synth or VSTi and the other being a VSTi (ie jamstix)?