connecting to remote FMS from local Flash

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hello;

I am testing with 2 different servers, both are on internet webservers:
server A: Flash Communication Server ... rtmp://server_A.com
server B: Flash Media Server ... rtmp://server_B.com


I have a FlashCS3 application that attempts to netconnect;


test A - while in the FlashCS3 authoring environment I attemp to connect to server A; the netconnection is rejected ( however if I post the .swf to the webserver that hosts server A, the netconnection is successful );

test B - while in the FlashCS3 authoring environment I attemp to connect to server B ... netconnection is successful;


any thoughts as to what the rules are for connecting to a remote FCS/FMS from a local Flash environment??


thanks
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