macromedia flash flash remoting: Hello

I've got a strange problem connecting to a webservice from flash. Everything
works fine when I run the movie from the flash authoring environment, but when
I upload my swf and run in the browser (IE or firefox, doesn't matter), I get
status errors...

fault: Client.Disconnected
code: WebServiceFault
error: Could not load WSDL

The web service is written in PHP and works if it's on the original authors
server (it's part of a tutorial). But when I uploaded the exact same php code
to my server, flash can't access the WSDL when playing in a browser. Is there
some access priveleges I need to know about that the flash player is looking
for?

Looks like I just need to add a crossdomain.xml policy file to allow other sites to access my 'precious' xml data. Only took about 6 hours to figure this one out, not too bad!