hmm. when you insert soft synth, are you choosing the 'all synth outputs' option in the dialogue box which comes up?
if inserting kontakt 8, 8 audio tracks should be created (which are actually 4 stereo pairs) and double that in kontakt 16. if those are happening, then you should then be able to send the outputs of each drum within kontakt to a different output (when clicking on 'config' button)
if you do manage to get it working, make sure you save it from within Kontakt so the routing automatically happens next time you load that kit in a different project!