DJM-450 No sound output to pc

Hi !
I got the following problem :
I try to connect my djm-450 to my pc with usb ( a plan to use OSB system for recording ) . I got windows 10 system, with the latest djm -450 software installed from your site.
Computer settings: At the sound settings , at recorder devices windows can see DJM-450 device, but when i turn on the djm-450 , no sound output , the indicator not show any sound in windows.
Mixer settings: USB, and ch 1 , ch 2 switched to computer icon.

Pls give some full, step by step help how to set up correctly . How i see many ppl got the same problem with djm-450 and still no usefull answers.
Thx