Filter Effects

Hi, I’ve just viewed Advanced Filter Effects tutorial on gotoandLearn.com and after spending some time getting something I liked, I then tried to add it to another fla. The problem is the effects are applied to everything thats on the stage, I just want it applied to my movieclip, I want a nice little “vapor trail” coming off it. Any help would be appreciated, I’m new to using tweening and filters in this way. my code is below. It’s just the code from the tutorial but tweaked.
I have a movieclip in the library with the linkage name “Ai” Any help would be appreciated.

import caurina.transitions.*;



var bmd:BitmapData = new BitmapData(550, 400, true, 0x000000);
var bm:Bitmap = new Bitmap(bmd);
addChild(bm);

var bf:BlurFilter = new BlurFilter(5, 5, 3);
var cmf:ColorMatrixFilter = new ColorMatrixFilter([1.3,0,0,0,0,
                                       0,1,0,0,0,
                                       0,0,1,0,0,
                                       0,0,0,1,0]);

var ai:Ai = new Ai();
addChild(ai);

function mover():void
{
   Tweener.addTween(ai, {x:Math.random()*550,
                     y:Math.random()*400-100,
                     rotation:Math.random()*400,
                     time:1,
                     onComplete:mover});
}

mover();

addEventListener(Event.ENTER_FRAME, loop);

function loop(e:Event):void
{
   bmd.draw(this);
   bmd.applyFilter(bmd, bmd.rect, new Point(0,0), bf);
   bmd.applyFilter(bmd, bmd.rect, new Point(0,0), cmf);
   bmd.scroll(0, -8);

}