Why is there a red border around a movieclip?

I'd have to do several screenshots as you may be able to see from this overall shot. Look to the right.

I also have a number of comments on there which expands the length of the sheet.

So I'll post the code that applies, underneath.

I'm not sure right now whether I need to post the whole thing here.

Creating and loading the movieClip and loading images into it were the first two things that I put into the script.

The problem has always been present.

I have nothing else that applies to either the movieClip or the images being loaded into it.

The rest of the code is for:-

 - ensuring that the images go back or forward in the right order from any point.

- parsing the xml file for the images.

- for using xml data to load image titles and links and adding to a basket.

- mouse events.

- text formatting.

The other screenshot is of the instance of the emptyMovieClip instance properties.

////From The main class file////////////////////////

//For the movieClip.

public var imageLoader: MovieClip = new emptyMovieClip();

imageLoader.addEventListener(Event.ADDED_TO_STAGE, loadMovie);

function loadMovie(): void {

galleryL: x = (stage.stageWidth - imageLoader.width) / 2;
galleryL: y = (stage.stageHeight - imageLoader.height) / 2;

imageLoader.removeEventListener(Event.ADDED_TO_STAGE, f);
}

//For the image loader

public var nextImage:Loader = new Loader();

addChildAt(imageLoader, 0);

nextImage.load(new URLRequest("../images/"+currImage+".png"));

addChild(nextImage);

imageLoader.addChildAt(nextImage, 1);

///Other File///////////////////////////////////////

//emptyMovieClip.as

package {

import flash.display.MovieClip;

public class emptyMovieClip extends MovieClip {

public function emptyMovieClip() {
// constructor code
}
}

}