virker i P6 men ikke P7, hvorfor?

hej E's

er der dr nogen der kan fortælle mig hvorfor dette (udemærkede) script virker perfekt i flashplayer 6 export med ikke virker ved export til Player 7 ?
(halen forsvinder, sidste del af scriptet virker dog altid)

og hvordan kunne det evt. optimeres generelt (stammer fra en open source kode)



onClipEvent (enterFrame) {
    this.mandala._rotation += 6; // rotation thrust speed
    if (this._alpha<100) {// alpha fade-in
    this._alpha += 4;
    }
}
onClipEvent (load) {
    this.stop();
    this.mandala.stop();
    this._alpha = 0;
    radius = 220;// change the radius here or simply resize the perpetuum mobile movieClip 
    step = 5;// step accuracy of drawing the pieces of circle with alpha effect. A higher value here is good on slow machines but U lose quality
    circle_pi = Math.PI/180;
    this._yscale = 20;// scale of the 3D screw. 100 = 2D
    mxc = 0x0099cc;// color of the arrow
    mlen = 270;// length in degree
    this.createEmptyMovieClip("mandala", 100);// this nested movie is not needed by a 2D only arrow
    for (ratio=0; ratio<mlen; ratio += step) {
        with (this.mandala) {
            mv = (ratio/mlen)*100;// calculate the percentage alpha value decrement
            beginGradientFill("radial", [0x000000, mxc], [0, mv], [radius-20, radius-20], {matrixType:"box", x:-250, y:-250, w:500, h:500, r:0});// here [radius-20, radius-20] determines the stroke
            moveTo(0, 0);
            x = -radius*Math.sin(degree*circle_pi);// circle piece calculation
            y = -radius*Math.cos(degree*circle_pi);
            lineTo(x, y);
            degree -= step;
            x = -radius*Math.sin(degree*circle_pi);
            y = -radius*Math.cos(degree*circle_pi);
            lineTo(x, y);
            endFill();
        }
    }
    with (this.mandala) {// drawing the arrow head (triangle)
        x = -(radius+25);
        y = 0;
        moveTo(x, y);
        beginFill(mxc, 100);
        x = -(radius-55);
        y = 0;
        lineTo(x, y);
        x = -(radius-10);
        y = -50;
        lineTo(x, y);
        endFill();
    }
}



//M6 :)