I have PCLinux 2011 and the same sound card and no problems. If I go to the Control Center, Hardware, Sound Configuration, I do not have PulseAudio enable although I don't know if that will make a difference. I would suggest you log in to a Terminal as root user and type:
You will get a new window where you can adjust settings with the arrows on the keyboard. You can also see different options by hitting the F1 key, get system info with the F2 key, etc. Read it before you do anything. Move the right/left arrow to move from setting to setting and the
up/down arrows to increase/decrease.