[away3d] external swf into MovieMaterial

[metSyS]

I have a problem. To transform Embeded swf into MovieMaterial we need
to do next :

[Embed(source="Mxml.swf")]
private var mv:Class;
private var topMaterial:MovieMaterial = new MovieMaterial(new mv(),
{interactive:true, smooth:true});

But I need to transform swf into MovieMaterial from external file, so
I thought it must be :

private var frontMaterial:MovieMaterial;
...
var loader:Loader = new Loader();
loader.load(new URLRequest("Mxml.swf"));
frontMaterial=new MovieMaterial(loader);

But it doesn't work. Need help. Thanks.