[Q-error] security sandbox violation

Hi all

I got the following error , when i was trying to load an external XML file,

this script woks fine in FLASH …
but after I uploaded to web and test it … the error comes up

[COLOR=red]Error #2044: Unhandled securityError:. text=Error #2048: Security sandbox violation: [/COLOR][COLOR=red]http://www.abc.com/test.swf[/COLOR][COLOR=red] cannot load data from [/COLOR][URL=“http://www.abc.com/test.xml”][COLOR=red]http://www.abc.com/test.xml[/COLOR]

Any body could help ??
thanks ~!!