I'm having just about the exact same issue.
Using Sonar X1 with X1a patch, 64 bit. Line 6 Toneport ASIO audio drivers (current).
When I insert SD from track template (only way I can find to insert it), it inserts all the tracks, routing looks right. When I click the drums in the synth, I get sound and the appropriate track and bus meters move. When I play a pattern from within the synth, I get sound and proper meters again. When I drag a clip directly from session drummer into the midi track that opens with all the other tracks and hit play in my project, only the meter from the midi track moves, and I get no sound. When I go to output settings of the midi track, the only option is SD3 which is selected.
If I then close the project without saving (trying to get rid of SD3) and open a new project, SD3 isn't even an option to insert. I have to completely close Sonar and reopen. I'm completely in love with the track templates because they do all the tedious routing, but being able to drag grooves from SD3 into a midi track would be helpful
. I didn't have this issue on 8.5. Any suggestions at all?