I SEE the stream, but can't HEAR the stream Let's run through the checklist here - have you checked to make sure you're able to hear audio from your computer at all? Try opening a known media file locally in your Media Player, or MP3 player (like Apple's iTunes). If you have no media files to test, and you're using Microsoft Windows 2000 or XP, click on the little speaker icon in your taskbar and click around in there, listening for sounds coming out of your speakers. Also make sure your speakers are actually powered on and the volume is turned up to a level appropriate for your listening preferences (it sounds obvious, but sometimes we forget to check little things like that)
If you're not getting any sound at all out of your computer, and you're using Windows 2000 or XP - click the speaker icon in your taskbar, and verify that your sound drivers are setup correctly. If you don't know what that means, here's a helpful document to explain it all.