ActionScript 3.0 :: Get A Swf's Published Width And Height?

I am trying to build a component that needs to access the width and height of the swf it is loaded on to resize and reposition correctly. I could pass in these numbers to the swf but I'm trying to make implementation as easy as possible. I don't need stage.stageWidth or stage.width, i need the published dimensions.

I have tried accessing the stage's LoaderInfo.

Code:
var w:Number = stage.loaderInfo.width;

But I get this error even though the file has completely loaded. Error: Error #2099: The loading object is not sufficiently loaded to provide this information.

I have also tried this:

Code:
var stageInfo:LoaderInfo = LoaderInfo.getLoaderInfoByDefinition(stage);
var w:Number = stageInfo.width;

Which works great locally, but craps out online. "SWF_URL" is the same link by the way. This error makes absolutely no sense to me becuase the swf is trying to access itself. It's not trying to load some other content's data. SecurityError: Error #2119: Security sandbox violation: caller SWF_URL cannot access LoaderInfo.applicationDomain owned by SWF_URL.

Any thoughts on either fixing this security error or another way to introspect and grab the published dimensions?