Thanks for the feedback. I believe the sites that I am having problems with are not SL sites but other sources. My firewall blocks all incoming TCP ports. If I set my firewall to allow all outgoing TCP ports audio feeds work. If I block outgoing TCP ports except those needed by SL audio feeds break. I am able to find the outgoing TCP port that enables the audio feeds but it changes often. I'd rather not open a wide range of outgoing TCP ports.