Sound Won't Work

I downloaded Windows Vista: Home Premium on my Mac with the disk, and my sound won't work on Windows. When I go to the sound options, it says it is working, but the sound tests never have sound come out or anything. I tried hooking up external speakers, and those don't work either.

Does anybody know how to fix this?

The correct terminology is that you "installed" Vista not "downloaded" it. As for the sound problem, have you inserted your Leopard DVD and installed all the drivers for Windows?

Also make sure the sound is not muted or turned off. There are several places in Windows where you can control the sound from. The best place to look first is in Control Panel, Sound. Turn the levels up and uncheck the mute box if it's checked off.

Regards.