Komplete Kontrol S88 - sound from browser but not keys?
 

I just got an S88 and when I have Komplete Kontrol running on my Mac, the two talk to each other fine.

The puzzling thing is when I'm at the S88 using the large knob to scroll through the presets of a given library, I get the little "preview tone" of each preset, but when I press the actual keyboard keys, no sound, even if I "load" a preset.

What am I missing?