Check to see if maybe the sound card requires proprietary drivers. Click "System", then "Administration", then "Additional Drivers". Make sure you are connected to the internet. If it picks up any devices that require proprietary drivers, it will give you the option to "Activate" them. Do so, then reboot your computer.
Attached is a screenshot.
Last edited by dudeman41465; 02-07-2011 at 08:31 PM.