You hear the sound only from left ?
With a USB headset, the position of the 3D sound is always on the left ear.
The solution is to declare it as a 5.1 device (bug DirectX).
Go to the sound configuration by clicking on "Configuration".
Then click "Next" to reach this panel. Check "Front left and right". Click "Next" then "Finish". And voila!
This concerns does not exist on headsets jack nor on systems really 5.1.