I've set Rec Mode ON and Local Switch OFF on the kybrd.
Connected kybrd to PC with USB cable.
Using SONAR 6 Producer, set MIDI channel to 1 (same as on kybrd) in the MIDI track, and set MIDI In and Out to for "USB Audio Device" which is SONAR's description of the kybrd's USB connection as a MIDI device. When I play kybrd, the input light on SONAR's little MIDI icon (in the toolbar) blinks, as does the output light, but no sound is generated on the kybrd. Same thing happens with an existing MIDI file--MIDI output lite blinks but there is no sound.
I would appreciate any suggestions on how to resolve this problem.
Naturally, minutes after I posted this, I found the problem.
RD 700GX Sonar no MIDI playback