Scrolling text class help

Oks, so i am completely stuck and not sure what to do:
import flash.filters.BlurFilter;
class pirateandy.scroller.BlurScroll {
public function startScroll(mc_scroll_parent:MovieClip,
mc_scroll:TextField, mc_slider:MovieClip, mc_slider_x:Number,
mc_slider_y:Number) {
var blur:BlurFilter = new BlurFilter(1, 4, 6);
mc_slider.onPress = function() {
startDrag(this, false, 0, 0, mc_slider_x, mc_slider_y);
mc_scroll_parent.filters = [blur];
mc_scroll_parent.onEnterFrame = function() {
mc_scroll_parent.mc_scroll.scroll++;

};
};

mc_slider.onRelease = function() {
this.stopDrag();
mc_scroll_parent.filters = [];
_parent.mc_scroll_parent.onEnterFrame = function() {
stop();
};
};

mc_slider.onReleaseOutside = function() {
this.stopDrag();
mc_scroll_parent.filters = [];
mc_scroll_parent.onEnterFrame = function() {
stop();
};
};
}
}

oks so i know that the scrollbar will only scroll one way, but thats
not my problem, my problem is how do i actually get it freaking scroll.
help plz