Path to movieclip in external swf

Hello!
I have embedded a external swf in a movieclip called “container”. In the external swf is a movieclip “black_rectangle”.
How do I have to write the path to this rectangle? My version doesnt’t work and i have no idea why not :frowning:


_root.container.loadMovie("unterverzeichnis/unterseite.swf");
_root.container.black_rectangle._alpha = 13;

thanks!