Easing a empty mc with a dynamic image

I’ve worked on this for far to long to know success and it’s probably something really simple that I am forgetting

I currently have a empty movieclip created that loads the image from the url. This image_mc is given a actionscript tween from left to right. The problem is that it doesn’t move left to right. When you take of the loadMovie function it works as it should. any help would be appreciated.


this.createEmptyMovieClip("image_mc", this.getNextHighestDepth());
image_mc.loadMovie("http://www.macromedia.com/images/shared/product_boxes/80x92/studio_flashpro.jpg");

var currentFrame = 0;

image_mc.onEnterFrame = function() {
    currentFrame++;
    this._x = currentFrame*11;
    if (currentFrame>50) {
        delete this.onEnterFrame;
    }
};