Security sandbox violation when URL doesn't have 'www'

Question

I am loading an external swf file from the same domain into my main flash movie using an absolute path: "http://www.sitename.com/movie.swf". The problem is that when someone goes to the site without the 'www' in the address: "http://sitename.com" - the movie throws a sandbox error upon trying to load the 2nd movie.
I have a crossdomain in place set to: <allow-access-from domain="*" secure="false"/>.
I also have: Security.allowDomain("*"); in the document class of the main movie.
I realize I could use a relative path to load the movie instead of the absolute path, but shouldn't the cross domain file and/or the allowDomain command take care of the security issues? Is there another workaround besides the relative path?
Thanks,
Amanda

Answer 1

The crossdomain should work.  Check to make sure you have it set up properly.
Another workaround is to use the LocalConnection class to grab the current domain.  We do this at my company, where we distribute files out to the local server of the branch.
import flash.net.LocalConnection;
var lc:LocalConnection = new LocalConnection();
var myIP:String = lc.domain();
var pathToLoad = "http://"+myIP+"/movie.swf";