can't bounce down audio from Live via rewire

I have some loops in Live that I want to process and mix in Sonar. I can get Rewire working and hear the tracks from Live in Sonar but when I try to bounce them I get silence?  I've tried freezing, bouncing, bouncing with live input, putting a dummy MIDI clip in the rewire track nothing seems to work.
 
I'm using X3 and the latest version of Live 9 both 64 bit.
 
How does everyone else bounce rewire tracks?