DJM-250mk2 no audio output from my computer

Hello all,

i just bought a DJM-250mk2 and connected it on my computer with usb. installed the drivers and installed recordbox 5.4.3. (trial version)

I use 2 turntables connected to the phono lines

Most recent frimware installed (1.0.6)

But i there is no sound from my speakers

windows 10 64 bit build 1803

device is recognized

checked sounds settings and set my speakers default

see my configuration. please help !