Loading Images from Another Domain

I’ve created a flash app using ActionScript 3 that basically does the following:

[LIST]
[] Loads an XML file on Domain A. The XML file contains URL’s to images on Domain B and Domain C.
[
]Pulls these URL’s from the XML and creates Loaders
[*] Creates Flash Bitmaps out of the Loader.content.
[/LIST]

When I test this on my local hard drive, the images load from Domain B and Domain C with no problem. However, when I host the flash file on a server, it’s unable to load the images.

Can anyone help?
Thanks.