Hi guys it's late on the west coast and I'm about to hit the sack because I can't figure out what I'm doing wrong in X2. I have Session Drummer 3 on a track and I have some MIDI loops that I have dragged onto the track. I've successfully frozen the MIDI to audio countless times before but now whenever I try it no audio appears or can be heard. Any setting I may be overlooking?

My thoughts are all basic things and if you have done this before, I am sure you know.  Do you have this set up as separate MIDI and audio tracks, or as a simple instrument track?  Do you see waves and just don't hear them?

Got be be something simple. Is a kit loaded?

all your midi should be on one track and not multiple tracks.
freeze it/clone it to audio/unfreeze and delete midi.

I have it set up as separate midi and audio tracks with Session Drummer routing each drum to its own track. I don't see any waves and yes I have a kit loaded.

So, you have all your midi data on one midi track, and all the kit pieces routed to individual audio outputs yes?
 
Try selecting the entire Midi track and bouncing to clip, now try freezing the synth again (click the snowflake icon in the Midi track header)
 
If this fails, get back to us