(HELP) How do I use my Pioneer xdj rx for radio streaming?

Hi everyone I hope that someone is able to help me.

I have just got a pioneer xdj rx and I would like to use it for radio streaming on my laptop using ustream.com
I have my laptop connected to my soundcard, my monitors are connected to my soundcard and my pioneer xdj rx is connected to my laptop via usb and I still can not figure out how to get sound and to get it all set up to steam online.
If someone could shed some light on this that would be appreciated.