Aloha h, and welcome to the board. E’ Komo Mai’.
This may or may not help because:
1-I have C6.5 (not Artist)
2- I use Instrument tracks (not MIDI tracks)
That being said; this may still help.
Using the 'Export function try to export one track.
In your case try either the kik or snr.
While in the Export d/log box near the bottom there is
a tab called: ‘Import into Project’.
Tick the lil box that says ‘audio track’.
Now Export.
That should put an audio file of your kik or snr back onto the
Project page. (and in the pool if you want)
Then delete or mute the original MIDI track or
have them both play for a bigger sound.
Rinse and repeat for all other tracks and ‘bob’s yer uncle’. 
Good Luck!
{‘-’}