ActionScript 3 :: Flash - How To Modify Label Component Text

I'm trying to modify the text of a Label component that I already placed on the stage in as3. I'm having trouble getting the text to change though, it just stays the same based on the initial text I typed in. I'd like to eventually have the label contents change dynamically. When I compile the swf, the two labels have the original value I gave them when I put them on the stage, not the startDate and endDate values.

My code looks like:
package {
import flash.display.*;
import fl.controls.Slider;
import fl.events.SliderEvent;
import fl.controls.Label;
public class slider extends MovieClip{
[Code] .....