Simple pre-loader not working

Question

I have made a simple pre-loader to leave the first frame and
go to the second frame one the bytesTotal has been reached. In the
loader i have a simple rectagle (instance named 'bar_mc') that i
want to grow as the bytesTotal is reached. Currently the screen is
blank when the file is loading nad then you see a flash of the full
rectangle just before it plays frame 2.
Here is the code i am using which is all on frame 1. Any help
is apprecialted:
stop();
root.loaderInfo.addEventListener(ProgressEvent.PROGRESS,
progressHandler);
function progressHandler(myevent:ProgressEvent):void {
var myprogress:Number =
myevent.bytesLoaded/myevent.bytesTotal;
bar_mc.scaleX = myprogress;
root.loaderInfo.addEventListener(Event.COMPLETE, finished);
function finished(myevent:Event):void {
play();
}

Answer 1

There is code missing from that, or it is defined somewhere
else. I suggest visiting gotoandlearn.com and going thru the
preloader tutorial there, it will define all of the elements you
need.