If users can't connect to your broadcast

Make sure the client computer has QuickTime 4 or later installed. If users are connecting using a Web browser, be sure the QuickTime 4 Plugin is installed correctly for the browser.
Make sure users have the correct URL.
If users are trying to connect to a broadcasted playlist, make sure the broadcast description file contains the correct IP address, destination base port, and pathname for the Session Description Protocol (SDP) file.
If users are attempting to connect to your broadcast over HTTP, make sure you disable any Web server that may be conflicting with your streaming server. Also, make sure Streaming on port 80 is enabled in the General Settings pane of Streaming Server Admin.