CC changes from headphones to monitor when starting iracing. help!

[chemtrail]

Hello all.
i have no problem with the app in windows. everything works great. but when i start the iracing servic , the CC audio goes from my headphones to my screen. and when i disable the audio divice on the screen, it goes silenc in iracing. but it is back when i go back in to windows 7. i have the sound from the spoter on my monitor and the background sound in my headphones(iracing sound is correkt. i have changed the setup in iracing to delault device and the headphones. but it still sends the aoudio from CC to the screen. any help on this ? or how to make it go into my headphones. i have disabled the spotter in iracing. i alsowe use VR DK2. my headphones is g35 logitech that uses usb.
and i have no errors.
thx for all help!