Don't know if your sound card is like this, if so connect it like this:
Layout of Aureon?7.1?USB?
Front layout
1?-? Analog headphone stereo line out (3.5mm jack)
2?-? Analog microphone input (3.5mm jack)
3?-? Analog mic input (3.5mm jack)
4?-?USB port
5?-? Increase volume
6?-? Decrease volume
7?-? Mute
Rear Layout
8?-? Digital optical input (Toslink)
9?-? Digital optical output (Toslink)
10?-? Analog stereo line input (3.5mm jack)
11?-? Analog Stereo Line Out "Front" (3.5mm jack)
12?-? Analog stereo line out "Front Surround" (3.5mm jack)
13?-? Analog stereo line out "Rear Surround" (3.5mm jack)
14?-? Analog Stereo Line Out "Center/Bass" (3.5mm jack)