movieclip plays before the preloader finishes

here is my AS3

var requestObj:URLRequest = new URLRequest("portfoliohome.swf");
var loaderObj:Loader = new Loader();
addChild(loaderObj);
loaderObj.load(requestObj);

loaderObj.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, preloadProgress);

function preloadProgress(event:ProgressEvent):void {
    var loadedPercent:int = event.bytesLoaded / event.bytesTotal * 100;
    animation.preloader_mc.loadingBar_mc.loaderText_txt.text =  loadedPercent + "%";
   
}

loaderObj.contentLoaderInfo.addEventListener(Event.COMPLETE, preloadComplete);
function preloadComplete(event:Event):void {
    animation.preloader_mc.visible = false;
}

I do have stop(); on the 1st frame of the portfoliohome.swf, but It plays the movieclip(my intro)

before the loader finishes.  Is there a way for me to move the play head to frame 2 while I have the stop() on the frame 1?

or if there is a better way of solving the problem, please let me know

thank you