Scrolling dynamic content

1

hi there, i have some code, and for some reason it will only scroll if a text-box is static, and i need it to scroll for dynamic content, the content is externally loaded.

fscommand("allowscale", "false");
bar.useHandCursor = dragger.useHandCursor=false;
space = 20;
friction = 0.9;
speed = 4;
y = dragger._y;
top = main._y;
bottom = main._y+mask_mc._height-main._height-space;

moveDragger = function (d) {
    if ((dragger._y>=y+bar._height-dragger._height && d == 1) || (dragger._y<=y && d == -1)) {
        clearInterval(myInterval);
    } else {
        dragger._y += d;
        dragger.scrollEase();
        updateAfterEvent();
    }
};
up_btn.onPress = function() {
    myInterval = setInterval(moveDragger, 18, -1);
};
down_btn.onPress = function() {
    myInterval = setInterval(moveDragger, 18, 1);
};
up_btn.onMouseUp = down_btn.onMouseUp=function () {
    clearInterval(myInterval);
};
MovieClip.prototype.scrollEase = function() {
    this.onEnterFrame = function() {
        if (Math.abs(dy) == 0 && drag == false) {
            delete this.onEnterFrame;
        }
        r = (this._y-y)/(bar._height-this._height);
        dy = Math.round((((top-(top-bottom)*r)-main._y)/speed)*friction);
        main._y += dy;
    };
};