Help: Sounds card problem (no sound)

SoundBlaster Live 5.1
XP
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My sound card used to work.....now I get no sound

I tried to reinstall the drivers from the retail cd with no luck. All
the settings that I can see look fine....the device is selected and the
volumes/mutes are all ok. I don't see any sign of a conflict and its
enabled.

It's not a hardware problem since when the computer starts, the bios
manages to play a sound clip stating that the computer is booting.

Anyone have any suggesting how to get my sound working?? I'm quite
sure its a driver problem but it doesn't seem to make a difference to
reinstall them. (I tried to uninstall the drivers before reinstalling
them, and I also let XP find the drivers itself...both with no luck).

Help Help Help
Thanks