Headphones stoped working on DDJ-RB

My headphones stopped working while connected to DDJ-RB. it happens when audio (on Windows Audio) is on Speakers/Headphones (Realtek Audio). if I change it to Line (2 PINEER DJ DDJ-RB) then the headphones works but no audio on the speakers. 

this is happening the first time. until now there was no problem with that.