Can't record computer sounds

I have recently bought a new headset (Corsair HS60 Pro surround) which caused alot of problems. Most of them I fixed, but I have one problem that I cannot fix at all. I can’t record my computer sounds (like youtube videos) I used to be able to use this with earphones, but now it doesn’t work. I’ve tried using stereomix, MME, windows WASAPI, I’ve checked many youtube tutorials, none of them worked. Any ideas? :smiley: (My OS is Windows 8.1)

Please see: