In suse 10.0 you have yast to setting up things, so try the following:
Open a terminal (konsole?), type 'su -' press Enter key. You will ask for your root password but you will nothing see as you type it in! press enter key and you should be working as root, now.
Type 'yast' within the terminal; in yast chose 'Hardware'->'Sound'->'Edit'.
Check your Sound card is recognized correctly, if it is (and only than!) chose 'Other'->'Start Sequencer', confirm starting the sequencer.
Chose 'Other'->'Volume' and check volum channels; try the 'Test' button
Sound shoud work now
Make your linux