Rockgod - did you create a 'safe' BCF song file in X2? Once you get that working, then each time you restart load it up, it won't work first time, quit Sonar, load again and it should work. Then you can close that project and load your proper one. So long as you then keep the BCF powered up, and don't restart the PC, it should load up correctly. Bizzare, but so far I'm getting it to work.
Annoyingly though, I can't find a way to shift to the buss channels. Pity because the fader control makes so much positive difference.