game capture card

Hey guys. I got a small problem. How do I get the game audio to have sounds. Everytime I record my video in OBS with my capture card, there is no game audio sound in my video. Is there a way to solve this issue. I need help with this problem please.

My cam doesen`t work when the game capture is working, but when my capture card is working my cam doesn`t work. I already updated all my drivers and in the Internet I doesn`t found how to fix it. pls help