3D sound problem (new headset)

I recently bought this headset http://www.asus.com/Multimedia/HSW1/

But in ArmA 2/3 on Windows 8 I hear all stereo sounds (gunshot, engine sound) from left side. So it is very annoying. I do not have this problem in any other game. And when I play ArmA 2/3 on Windows 7 on the same computer stereo sounds work well.

Does exist any way how to fix this?

[deleted]

I found difference between W7 and W8 sound settings so I correct it. And it is working now fine. Thank you.