hey! I just bought an m audio profire 610 to use with traktor and my VCI 100. I'm really happy with it except for one minor inconvenience. I can't seem to route my monitor channels to the headphone outputs on the front of the box. Of course i fixed this by just routing them to one of the outputs on the rear of the box, but that leaves me unable to control the headphone volume with the knobs on the front. In the internal mix preference i don't seem to see the option for the headphone outputs, and they automatically work as master outputs. Does anyone else have experience with this interface? any ideas? thanks.