Vista - No sound on webpages

Hello,


I'm currently having some sound issues with my Dell Notebook.

There is no longer a start-up sound, nor any alert sounds, the buttons on my
keyboard that used to control the volume no longer work, nor does it light
up; the volume icon will not appear on my tray, and there is no sound when
playing embedded files from webpages.

--The "display icon in taskbar" is checked
--My volume is not muted.
--"Device is working properly"
--I have system sounds enabled
--I do get sound from CDs, DVDs, and any files that can be played through my
media players

i also tried My Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Drivers32

And then on the right pane, right click and click on New, select String
value, enter "wavemapper" (without quots of course), press ENTER
Then right-click on "wavemapper", select modify, and type "msacm32.drv"

and that don't work..


Any ideas....?