getBytesTotal doesnt return any value??

[kinx]

Hi

I am loading an image into a holder clip (holder2) off stage and then loading it into a display clip (holder) when fully loaded

here is the code

function imageLoader(image2load) {
	//load image into holder clip
	holder2.loadMovie(image2load);
	//show loader mc
	_root.loader.gotoAndStop("on");
	_root.loader.indicator.onEnterFrame = function() {
		bytesLoaded = holder2.getBytesLoaded()/1024;
		//this is not returning any value
		bytesTot = holder2.getBytesTotal()/1024;
		//if I specify the bytesTotal it works
		//bytesTot = 340;
		if (bytesTot>5) {
			percent = int((bytesLoaded/bytesTot)*100);
			_root.loader.indicator.percent.text = percent+"%";
		}
		if (bytesLoaded>=bytesTot && bytesTot>1) {
			//place image into display clip
			holder.loadMovie(image2load);
			//hide loader
			_root.loader.play()
			delete this.onEnterFrame;
		}
	};
}
imageLoader("images/home.jpg")

The getBytesTotal request does not return any value, the code works cos if I hard code the value the loading works???

Any ideas? is there a setting on the server that needs to be set to allow this to work??