earlier on you said " as far as i know, alsa has a driver for my card..". well are you SURE they do?
either way-- try this next: if you use kde you need to make sure the sound server is set correctly in kcontrol... then set the systems sounds to work (if you like beeps & boops
you can test to see if sound is working there also. leaving the choice to 'autodetect' once you found your correct setting is probably the best way to go.
leave 'duplex' and network sound off for now.
in gnome you use gstreamerprobe (maybe you can use this prog in kde tooo, i'm not sure though).
it will be under: desktop : preferences : multimedia systems selector.
in either one of these windowmanagers you will need to set the sound to the proper 'sound manager'.. ie. alsa, oss, esd, etc.
hang in there..