Computer sound pass through DDJ-ERGO

Hello, i bough a new computer (windows 10) and installed Virtual DJ 7.4 wich work well. But my headphone only give the master sound, the cue doesn't work. I tried every sound configuration possible. No such problem with my old computer. 

In addition, when i play a video on YouTube for example, so sound from computer... but in my DDJ-ERGO master sound through external monitor...

Any ideas?

Many thanks!