Simple preloader problem

Question

hey, Im new to actionscript 3 and I am trying to make a a simple preloader for a game. the game is a SWF file located in the same directory as the preloader. the premise is very simple but I cant seem to understand my error problems. I have a MC called "preloader_mc" on stage (it says Instance of: preloader_mc in the properties panel, but theres also an empty field called '<instance name>'). Inside the preloader_mc is my dynamic text field which is named "txtLoad", and 1/4 circle line which is supposed to circle the percentage loaded in the text field. the circle is name "circle_mc" which an instance name of circle_mc.
I have an external AS file called PreloaderAS and it contains:
package {
import flash.display.MovieClip;
import flash.display.Loader;
import flash.events.Event;     
import flash.events.ProgressEvent;
public class PreloaderAS extends MovieClip {
public var loader:Loader = new Loader();
public function PreloaderAS(){
loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS, loading);
public function loading(ev:ProgressEvent):void {
var pct:Number = ev.bytesLoaded/ev.bytesTotal;
trace( ev.bytesLoaded + " / " + ev.bytesTotal + " = " + pct);
circle_mc._rotation += 7;
var strPct:String = Math.round( pct * 100).toString();
preloader_mc_txtLoad.text = strPct + "% Loaded";
The errors are:
1119: Access of possibly undefined property _rotation through a reference with static type Class. (2x)
1120: Access of undefined property preloader_mc_txtLoad.

Answer 1

my files (.fla, .as, and the swf) are located here:
http://www.speedyshare.com/files/27178512/download/preloader.zip