iChatAV and PC Network!

I currently run a power mac dual G4 with iChat AV on an airport network that is connected to a windows server. For some reason I cannot get the video function to work through this server. The chat function works just fine, it's only the video and the audio that does not work. To test to see if it was my computer, i moved it to a different network (on campus) and the video worked just fine. Why is it that the video and audio does not work through my windows network!?!?
 
You need to open some ports in your proxy/firewall.

You can find a good description here:
http://docs.info.apple.com/article.html?artnum=93208

Here's a short excerpt from that page:

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UDP Ports
UDP Port 5060 is used by iChat AV for signaling and initiation of chat invitations. To use iChat AV behind a firewall, make sure your network administrator has opened UDP port 5060.

UDP Ports 16384 to 16403 are used to send and receive video and audio data. For any particular conference, 4 ports from that range of 20 are utilized.
One port is used for each of the following:
Video in
Video out
Audio in
Audio out
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Hope that helps you get the video going...
 
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