Mumble Doesn't Work -- Period

Been using mumble forever and never had a problem connecting to any other server. Just tried my second lobby through your site today, and the mumble didn't work again. I've tried dozens of dozens of times to connect via the button in the website's ui, as well as manually putting the information into mumble. Every time I tried to connect it spends about 15 seconds trying to connect then gives me either "Unknown Error" or "Cannot Connect to Server".

http://forums.steampowered.com/forums/showthread.php?t=3219201