Loader Class Not Working - Can anyone fix this?

programming flash
1

Here’s the error I’m getting… anyone know why?

siteLoader.as, Line 23 1061: Call to a possibly undefined method load through a reference with static type Loader.

package  {
    
    import flash.display.MovieClip;
    import flash.net.URLRequest;
    import flash.display.*;

    public class siteLoader extends MovieClip 
    {
        
        private var myLoader:Loader;
  
        public function siteLoader()
        {
            myLoader = new Loader();
            addChild(myLoader);
            var mySwfFile:URLRequest = new URLRequest("index.swf");
        
            //Problem Here    
            myLoader.load(mySwfFile);
        }
}

}