pinarello - 2011-03-15

I've been following the forums for some answers but I cannot get this to work. I'm trying to send the output midi from MuseScore to VMPK, in order to display the played MIDI notes.
Mac OS X 10.5.8
VMPK 0.3.3
MuseScore 1.0
Simple Synth 1.1
Can anyone help me out ?
Thank you.