About DDJ Ergo V

@Andrew > You need to have the Ustream software capturing the master 0/1 ouptut, not 2/3, which is why it's getting signal when the CH B fader is down and the headphone cue is engaged.

If your software doesn't support that, you'll have to find another solution.

I must change channels in my Traktor? I connect my controller to pc with usb only... Do I need more wires, or smth?

Because i cant chooose channels in streaming programm, because I have  only one Ergo V Line in in my  windows mixer in playback devices.....  I have latest firmvare aswell. 

It's possible the problem is that your Ustream software isn't picking up the ASIO driver, but rather the WDM driver, which wouldn't give you options to select which part of the soundcard is being used.

Another option you have is to run the master output from the ERGO to the line-in on your computer's soundcard (do NOT use the MIC input), then use that input as your source for Ustream.

Pulse, I cant share asio drive more than once on one app. I have rca x2-to minijack 3.5, and I try to connect this in my pc line in, but I have some noise... It is not critical, but I need make some volume up, and when I make this - Noise start to be annoying.... I need some simple external usb soundcard for my notebook ( because my notebook - main device for my Ergo ) 

Have you tried using ASIO4ALL? There are also other applications which can hijack the audio stream and use it across multiple applications.