Flash changes my URL to crossdomain.xml


I’m trying to load a policy file using:

But when testing the SWF in Fiddler, I get a 404 Error, and I noticed that it tries to load the XML from here: [COLOR=#0000ff]http://www2l.domain.com/crossdomain.xml [/COLOR][COLOR=black](the root of the domain, without the subfoders)[/COLOR]
[COLOR=black]Why does it changes my URL and what can be done about that?[/COLOR]