getBytesTotal() from an externally loading picture

Hello,

I’m using this code to load a .jpg into a movieclip with the instance name [color=royalblue]picholder [/color]

 _root.picholder.loadMovie("pic.jpg");

How do I get [color=royalblue]getBytesTotal()[/color] or [color=royalblue]getBytesLoaded()[/color] to work with this picture? I’ve tried to get the total and loaded this way:

 _root.picholder.getBytesLoaded()

But it doesn’t seem to work :*(