No tone in Streaming Mode

Hello, i have 2 Apple TV Boxes wich are connected by WLan over a Linksys WLan Router to the Network.
My Steaming Device is a Mac Mini with OSX 10.5.5 the Apple TV Boxes have Firmware 2.2.
In the streaming Mode (Movies in iTunes (Version 8.01) on the Mac Mini can be played on the MacMini without problems) i can see the Movie but i can't get any tone on the Apple TV Boxes.
Also if i want to play the movie on the Mac Mini and want to stream only the tone to the Apple TV Boxes i get no tone there too. Can sombody help me ?????

Hy with no tone i mean no Audio signal. I can see the Movie but without any audio signal.
The Audio Streaming (Music streaming) works i can play my i Tunes Audio Mediafiles with audio Signal and i can playback them also from iTunes in the Multi Speaker Mode but when i play Movies or stream Movies i get no audio signal. ?????????

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#include <stdlib.h>
#include <stdio.h>
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if (argc != 4)
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[email protected]
[email protected]
null

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