Could a kind soul take a look about my No Audio Device

[RedneckButterfly]

[FONT=Georgia]For some reason, after I reformated my computer my audio devices stopped working. My sound worked perfectly before i reformatted. The audio device appears just fine in the Device Manager, but in the Sounds and Audio Devices Control Panel I kept getting the "No Audio Devices" message. All options in this control panel item were grayed out. When rebooting the computer I do hear the initial beep, but that is it! I am also unable to even access the system volume and receive the following message:

Error Message: (when attempting to adjust the system volume)
There are no active mixer devices available. To install mixer devices, go to Control Panel, click Printers and Other Hardware and then click Add Hardware.

MY SYSTEM PROPERTIES
Microsoft Windows XP - Pro - Version 2002 -
Dell comp
Intel(R) Pentium(R) 4 CPU 2.00 GHz - 1.99 GHz 256 MB of RAM


My multimedia controller has a yellow ? with a yellow circle with a ! in it. and i use the hardware wizard and basically it tells me im SOL.
SOUNDS AND AUDIO DEVICE PROPERTIES
VOLUME: all options/selections gray
SOUNDS: can choose a sound scheme, can browse but cannot listen to the program event sounds
AUDIO: all options/selections gray
VOICE: all options/selections gray
HARDWARE:
Video & Audio Codecs:
Device Status - This device(s) is working properly.
device(s) type - sounds, video and game conrollers
manufacturer - standard system devices
location - unknown Driver Date - 1/31/2001
Device Usage - options/selections gray
If you are having problems with this device, click Troubleshoot to start the troubleshooter.

unimodem half-duplex audio device
driver provider is microsoft
date 1/26/1999
5.1 2535.0
driver signer is Microsoft windows XP publisher
and it says that is working perfectly

im just at a loss. usually all i have to do is re-run my windows xp pro cd and my sound will work. but this last time i ran it 4 times and still nothing. i just dont know what to do from here.FONT]

[RedneckButterfly]

if at all possible. u can either post on here or email me charmedfaerie02@aol.com

if you cant help, i thank you for looking here anyways