> Any help would be appreciated greatly.
This is one of those bizarre windows behaviours that there simply is no
explanation for. Things that have been working stop, either because of some
totally unrelated change, or sometimes completely by themselves. There's no
straight-forward checklist you can go through that will automagically fix
it, but make sure that the outputs in the sound mixer (the little speaker
icon in the tray next to the clock) aren't muted!
If this is not the problem you can try deleting the card from the device
manager and reboot your computer and see if it works again (it will be
detected again once the computer starts up and hopefully behave properly).
Next step would be to uninstall the drivers from the control panel's
add/remove programs applet, reboot, then reinstall them again.
Let us know how it goes, k?