Cross DJ 3.3.10 & Numark Mixtrack Pro 2

Software : Cross DJ 3.3.10
MIDI Controller: Numark Mixtrack Pro 2
Windows 10.
All buttons of controller works fine but there is no sound at my headphones.(the cue button at cotroller is active but there is no sound at my headphones)
please help!!
MIDI Controller: Numark Mixtrack Pro 2
Windows 10.
All buttons of controller works fine but there is no sound at my headphones.(the cue button at cotroller is active but there is no sound at my headphones)
please help!!