Hope this helps:
If u are sure that the cables are connected to the soundcard mic socket, then getting ur sound to work is no big deal.
I use alsa and running alsaconf as root configured the card.
Then i installed a software Audacity to record sound (it worked like a charm)
I have a creative sb 4.1 digital (ensonique chipset) soundcard.
also u will need wxwindows for audacity