I’m testing the Red5 server to see how to use it for audio and video streaming but right after testing the connection to the server, I get the following error message in my Output Panel (though the connection to the server has been established correctly):

Error #2044: Unhandled AsyncErrorEvent:. text=Error #2095: flash.net.NetConnection 
was unable to invoke callback onBWDone. error=ReferenceError: Error #1069: Property 
onBWDone not found on flash.net.NetConnection and there is no default value.

After digging around it seems that I didn’t specify the client for the NetConnection object:

netConnection.client = this;

After setting the client property, all was well. So don’t do the same mistake as I did.