Help with simple preloader- please

Question

hello,
i'm trying to get a simple preloader and progress bar working
for a swf file. The problem is the main swf. movie starts playing
under preloader before the preloader is finished. So when the
preloader has finished you are already well into the main movie.
(After the movie loops you can see the first part that was missing
during the preload.) This is the AS that i found from a web site
(MonkeyFlash), it is AS 3. Below is the script.
here is a link to the page with the movie:
http://www.aquatichealings.com/new/
Also is it not advisable to use AS3 because it will only work
in Flash 9 and not below and most people may not have 9? Should i
be starting over in AS2. I had built a AS2 in Flash CS3 but had the
same problem.
Please kindly advise on how to make it work correctly. I'd
really appreciate some help, i've gotten books and scoured the web
for different methods and i'm afraid i'm a bit of a numb skull with
Flash and can not seem to get a simple preloader and progress bar
working correctly. THANKS!
gregory
var myRequest:URLRequest = new URLRequest("aquatic-h.swf");
var myLoader:Loader = new Loader();
myLoader.load(myRequest);
myLoader.contentLoaderInfo.addEventListener(Event.OPEN,showPreloader);
myLoader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,showProgress);
myLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,showContent);
var myPreloader:Preloader = new Preloader();
function showPreloader(event:Event):void {
addChild(myPreloader);
myPreloader.x = stage.stageWidth/2;
myPreloader.y = stage.stageHeight/1.2;
function showProgress(event:ProgressEvent):void {
var percentLoaded:Number =
event.bytesLoaded/event.bytesTotal;
myPreloader.loading_txt.text = "Loading - " +
Math.round(percentLoaded * 100) + "%";
myPreloader.bar_mc.width = 198 * percentLoaded;
function showContent(event:Event):void {
removeChild(myPreloader);
addChild(myLoader);
}

Answer 1

... the pre-loader clip must be accompanied by a "stop"
perhaps a "stop all sounds", too ActionScript on the action layer
of the main timeline.
I keep it simple and ask my prloader to not let the main
timeline play until the final frame of the movie has loaded. The
final frame is accompanied by a frame labeled "End" on a layer of
the main timeline of just labels.