VS-20 Patch Select Buttons Quit Working

I just got my VS-20 a couple of days ago, and it worked great.  Suddenly today, my Patch Select buttons stopped working.  I can still change patches in the software; it's only the two hardware buttons that quit working.  All other hardware buttons work fine.

I've completely uninstalled/reinstalled all Cakewalk/VS-20 software and drivers.  I've tried a Windows System Restore.  Neither of those fixes it.


I've installed on another computer, and the buttons work fine, so I think it's safe to say it's not a hardware fault.  And again, they worked fine on my computer...at first.

This has been driving me insane all day...can anyone offer a suggestion?