People trying to watch the presentation broadcast get a message saying that their computers can't connect to the broadcast.
Make sure that the network location you specified for the location of the presentation broadcast files is accessible by everyone you want to see the broadcast. (People outside the company won't normally be able to access your presentation broadcast location, for example.) If this is happening to the 16th person trying to view the presentation broadcast, you will need to switch to using NetShow. On its own, PowerPoint can't broadcast to more than 15 people.
When people open the broadcast lobby page, they see a mostly empty Web page.
Make sure all your viewers are using Microsoft Internet Explorer 4.0 or later ...