Using the MR 816 with Wavelab

Surely this issue has come up. I’ve tried out Wavelab 7 as a trial and noticed that its output bypassed the main sound driver for the MR 816. Which is very odd, as all the other sounds coming out of my computer (iTunes, sounds from webistes, etc,) are routed through the MR 816 when it’s fired up. Is there a way to tell Wavelab that I want the output routed through the MR?