Sounds like more of a surround sound issue. In other, you don't have the sound card setup for 5.1. Go into the windows setting and make sure it is setup for 5.1(right click windows speaker icon>playback devices>configure 5.1 and also check the soundcard and set that up.
Now of course this will be simulated 5.1 since your headset is a stereo headset and not as good as having "discrete speakers" but it should still work pretty well.
Happy surround sound gaming, the Prisoner...