I have a sound card on my system but Ubuntu does not recognize it

I have a sound card on my system (Sound Blaster) and works just fine with my Windows XP OS, but with Ubuntu, its not recognized. In the terminal, I ran the "lspci" (without quotes) command and this is the information it gave me:

linux@linux-desktop:~$ lspci
0000:00:00.0 Host bridge: nVidia Corporation: Unknown device 0071 (rev a3)
0000:00:00.1 RAM memory: nVidia Corporation: Unknown device 007f (rev a1)
0000:00:00.2 RAM memory: nVidia Corporation: Unknown device 0075 (rev a1)
0000:00:00.3 RAM memory: nVidia Corporation: Unknown device 006f (rev a1)
0000:00:00.4 RAM memory: nVidia Corporation: Unknown device 00b4 (rev a1)
0000:00:01.0 RAM memory: nVidia Corporation: Unknown device 0076 (rev a1)
0000:00:01.1 RAM memory: nVidia Corporation: Unknown device 0078 (rev a1)
0000:00:01.2 RAM memory: nVidia Corporation: Unknown device 0079 (rev a1)
0000:00:01.3 RAM memory: nVidia Corporation: Unknown device 007a (rev a1)
0000:00:01.4 RAM memory: nVidia Corporation: Unknown device 007b (rev a1)
0000:00:01.5 RAM memory: nVidia Corporation: Unknown device 007c (rev a1)
0000:00:01.6 RAM memory: nVidia Corporation: Unknown device 007d (rev a1)
0000:00:02.0 PCI bridge: nVidia Corporation: Unknown device 007e (rev a2)
0000:00:04.0 PCI bridge: nVidia Corporation: Unknown device 007e (rev a2)
0000:00:09.0 Memory controller: nVidia Corporation CK804 Memory Controller (rev a4)
0000:00:0a.0 ISA bridge: nVidia Corporation CK804 ISA Bridge (rev a4)
0000:00:0a.1 SMBus: nVidia Corporation CK804 SMBus (rev a2)
0000:00:0b.0 USB Controller: nVidia Corporation CK804 USB Controller (rev a2)
0000:00:0b.1 USB Controller: nVidia Corporation CK804 USB Controller (rev a4)
0000:00:0d.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2)
0000:00:0f.0 IDE interface: nVidia Corporation CK804 IDE (rev f3)
0000:00:10.0 RAID bus controller: nVidia Corporation CK804 Serial ATA Controller (rev f3)
0000:00:11.0 RAID bus controller: nVidia Corporation CK804 Serial ATA Controller (rev f4)
0000:00:12.0 PCI bridge: nVidia Corporation CK804 PCI Bridge (rev a2)
0000:00:13.0 Bridge: nVidia Corporation CK804 Ethernet Controller (rev a3)
0000:00:17.0 PCI bridge: nVidia Corporation CK804 PCIE Bridge (rev a3)
0000:01:00.0 VGA compatible controller: nVidia Corporation NV41.1 [GeForce 6800] (rev a2)
0000:03:03.0 Multimedia audio controller: Creative Labs: Unknown device 0005
0000:03:0a.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A IEEE-1394a-2000 Controller (PHY/Link)
0000:04:00.0 VGA compatible controller: nVidia Corporation NV41.1 [GeForce 6800] (rev a2)
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Now the line "0000:03:03.0 Multimedia audio controller: Creative Labs: Unknown device 0005" is what should be installed and working for the sound but
the line "0000:00:0d.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2)" is acting as the sound card (but there is no sound). There is no sound at all for any programs, errors, and anything else at all.

How do I get the Creative Labs Sound Blaster working so that I can have sound?

Thanks a bunch,
Mike