I'm developing VideoChat. Please Please help me. I'm going to crazy.

Hi All.

First of all, sorry for my very poor english. But I'll do my best to explain my problem.

I've struggled to solve my problem during 2 weeks. Unfortunatelly, I couldn't find the solution. Please help me. You can be my sunshine.

I'm developing VideoChat using Flex4.6 FMS4.5. 

I found sample source code here. http://renaun.com/flex2/fms/VideoConferenceWDDJ/

But This App is not working properly.

When UserA is logged in, UserA is publishing.  I think everything is perfect.

Weh UserB is logged in, UserA is Publishg&Viewing and UserB is Publishing&Viewing. Everything is pecfect.

When UserC is logged in, all users are disconnected(see the FMS admin console). But some movie is woking(not all the movie).

I don't know what is the problem? I guess...

1. Bandwidth Problem

2. FMS Configuration Problem.

3. FMS Version.(I use Developer Version)

4. Flex Compiler Version.

I've tried so many times. (I formatted my system. I reinstalled Flex, FMS. And I check all the source code so many times. I think the source code has no problem.)

What is the problem? Please give me a favor.

Thanks in advanced.

Kevin.