FMS: "two-way audio-video communication" article - problem

Hi,

I found an interesting article:

http://www.adobe.com/devnet/flashmediaserver/articles/ora_learning_fms3.html

I read the 2 .article, named: "Chapter 5: Two-way audio-video communications"

http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/flashmediaserver/pdfs/ora_learning_fms3_ch05.pdf

I have copied the server side code and the client side code out of the  e-book("A Better Two-Way Chat Application"). All the thing i changed in the codes are:
-in server side  code: nothing
-in client side code:
          -original  line:       var rtmpNow:String="rtmp://192.168.0.11/deux";
          -changed  line:     var  rtmpNow:String="rtmp://wl78lftffoo.rtmphost.com/kamerarandi";
                                        (The  service provider gave it to me that url)
 
When i try to  connect (you can try it here): mz203.atw.hu), after a few seconds  the  Flash Player crashes.(I see myself and the other person for 1-2  seconds).

Have you got any idea, why is this?
 
Thanks,
Z