External Midi into a MicroKorg

I have bought a microKORG which I'm really loving the sounds. My problem is that I'm a pretty terrible keyboard player so was hoping to route the piano roll from within Studio One 3 into the MIDI input of my Korg (that way I can draw in the notes etc) and then record the output audio from it as an Audio Track.

Is this possible?

I have a midi in/out USB cable and the keyboard is found etc - in fact I can use it as a MIDI keyboard input - just can't seem to pass MIDI note data to it.

Any help would be massively appreciated.