Why can't the person I'm calling on Skype see me?

Episode 904 (2:00:28)

Dwayne from Half Moon Bay, CA

Dwayne is trying to demo CamTwist over the Internet using Skype and the other side can't see him. Leo thinks it's far more likely that the issue is on the receiving end of Dwayne's Skype call and not him. They may not be using the most recent version of Skype.