No Audio on Windows XP

[hotbuns]

Got VirtualBox a few hours ago on my Mac OS X, and everything worked smoothly except this audio problem. So I've tried the usual stuff that I've read on the other forums (i.e. go to settings and enabling audio, changing host audio drivers/audio controllers) and nothing has worked so far. I can't hear a single thing on Windows XP and when I go to Control Panel>Sounds and Audio Devices it says "No Audio Device". Any help would be appreciated, thanks.