Reply to Deck C Not Working with new VCI-100 SE

Hello all,
I just started playing with my new VCI-100 SE (It's awesome by the way), and I have run into a problem. When I have all 4 decks open in Traktor Pro, deck c says "Audio Through" and won't let me load a track into it. Does anyone know how I can fix this? Thanks and I love the controller.