dynamic resize for external swf

[No-Tec]

Okay, so this is what I've got

http://www.dbry.com/test/indexx.html

When the movie loads it says

onClipEvent (load) {
    _root.createEmptyMovieClip("containerMC", 0);
    _root.containerMC._x = 32;
    _root.containerMC._y = 32;
    _root.containerMC.loadMovie("news.swf");
}

and this is what the moving visable movie clip is doing

onClipEvent (enterFrame) {
    speed = 3;
    this._width += (_root.containerMC._width/2-this._width/2)/speed;
    this._height += (_root.containerMC._height/2-this._height/2)/speed;
}

but whenever I click a button to load a new swf, the visable movies dimentions go to 0x0 assumingly b/c the containerMC is dissappearing for a monent? Well what I want is have the visable clip keep its dimentions when a button's clicked and somehow preload the new swf, than when its loaded, resize to fit it [which ive done] so it doesnt have so much crazy movement.

any direction i should go would help alot. thanks guys.