prelisten / headphones by hercules 4780722 dj control air dont work on traktor 2

hello,

i have just bought a traktor 2 pro licence and have connected it with my dj control air 4780722 and everything works perfectly. however there is a single problem: i cant prelisten with my headphones i connected on the controller. when i try to change it in the settings it is dont even shown in the selections. how can i set up my headphones to traktor?

thank you for answers 

The PDF document included with the MIDI mapping file available from the Technical Support site will give you the configuration to use to use your headphones properly: