I'm having a couple problems, the most important of which (to me) is lack of sound

I'll tackle the processor running at half speed later, but now I just want some music!
Here's my info, hope it's enough.
Operating System System Model
Windows XP Professional Service Pack 2 (build 2600) NCS_Technologies Conquest_II
System Serial Number: M152009-6897
Enclosure Type: Tower
Processor a Main Circuit Board b
750 megahertz Intel Pentium III
32 kilobyte primary memory cache
256 kilobyte secondary memory cache Board: ASUSTeK Computer INC. REV 1.xx
Bus Clock: 100 megahertz
BIOS: Award Software, Inc. ASUS P3B-F ACPI BIOS Revision 1006 05/19/2000
Drives Memory Modules c,d
19.99 Gigabytes Usable Hard Drive Capacity
5.35 Gigabytes Hard Drive Free Space
_NEC DVD_RW ND-3520AW [CD-ROM drive]
3.5" format removeable media [Floppy drive]
Maxtor 91010D6 [Hard drive] (10.00 GB) -- drive 1
Maxtor 91010D6 [Hard drive] (10.01 GB) -- drive 0, s/n V60RBWSA, rev PAS24F15, SMART Failure
WDC WD800BB-98DKA0 [Hard drive] (80.03 GB) -- drive 2, s/n WD-WMAHL3754538, rev 77.07W77, SMART Status: Healthy 448 Megabytes Installed Memory
Slot 'DIMM 1' is Empty
Slot 'DIMM 2' has 64 MB
Slot 'DIMM 3' has 128 MB
Slot 'DIMM 4' has 256 MB
Local Drive Volumes
c: (FAT32 on drive 0) 9.99 GB 2.49 GB free
f: (NTFS on drive 1) 10.00 GB 2.86 GB free
I had a Sound Blaster card that went kaput so I installed an older card I used before and now I can't get anything. The sound card I installed is an Avance Logic als4000 on an Asus p3bf
HELP!!