Potential Causes

• Firewall Issues: It may be possible that you are behind a firewall that has blocked off the necessary ports that allow Ustream to connect.
• Flash: It may be possible that you do not have the most updated version of Flash or your Flash has been corrupted

Troubleshooting

• Open Firewalls: You want to check whether the standard ports for video streaming and chat are blocked. They are port number 1935 for video streaming and port number 6667 for IRC chat. Here is information on how to open the ports:
  • http://support.microsoft.com/kb/308127 (PC)
  • http://homepage.mac.com/car1son/static_port_fwd_firewall.html (Mac)
  
  
• Update Flash: http://www.adobe.com/products/flashplayer/