Reply to S4 with Ustream

Hey there guys,

I've been trying to get this setup for over a week now.

I'm on a macbook pro running OSX 10.6

I've looked all over the net, but cant figure out how to get a live stream out of traktor pro (with my s4), to Ustream.

I have tried selecting S4 in Ustreams audio source

I'm not sure what settings i have to change inside Traktor's broadcasting settings.

I'm completely lost, and would love some help, im sure its not a huge thing to setup