Half-Life² with 5.1?

[simon]

hi, i have a Creative Inspire 5.1 system, and when i put the setting to 5.1, it didn't change to 5.1?
anyone know how this could be?

This is my system:
(Digital Inspire 5500)
http://us.creative.com/products/product.asp?category=4&subcategory=25&product=990

I would love to play HL² with surround

Tia !