I found out the hard way that AH won't even load if you don't have a sound card properly installed.
Here's a tip, however: Go to creativelabs.com, go to the support drop-down menu, and use the autoupdater.
I have an Audigy. I got it second hand, but it works. Problem is that there are no drivers to download, anywhere, for it. So I can only update it using the autoupdate feature at creative labs. Give it a shot, it should work