WOW I couldn't have asked for a LESS informative product page on those speakers... THANKS CREATIVE!
anyway you should be able to answer your own question:
Do your speakers have an optical input?
I can tell you just by looking at the picture of your sound card that it DOES NOT support optical.
Not very many PC speakers support optical audio...
An optical input/output will look like this:

(the thing right int he middle of the picture if you still confused)
This post has been edited by twistedsymphony: Nov 18 2005, 01:54 AM