That are expected shuttle messages. So it should work. The question is still the same, are you sure controls are not working? F.e. with shuttle, in "normal" mode they it should do fast forward/rewind, like corresponding transport keys but with position dependent speed (so when return to the initial position, transport stop moving). But there are other modes.
If hardware is sending the messages and Sonar receives them, VS700 plug-in should work.
Just to be sure all these messages are "delivered": install AZ Controller and set its input to VS700, now operate controls which are "not working", if you see changes in the "Last MIDI event", everything is fine.