[dmitriev]

попробуйте так

public var currentPhoto:DisplayObject;
private var userPhotoLoader:Loader;
 
public function viewPhoto():void {
    if(currentPhoto)
        removeChild(currentPhoto);
 
    userPhotoLoader = new Loader();
    userPhotoLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeLoadListener);
    userPhotoLoader.load(new URLRequest(vk_photo));
}
 
private function currentPhoto(event:Event):void {
    currentPhoto = userPhotoLoader.content
    addChild(userPhotoLoader.content);
}