Why can't i get an object onto the display list!!!

Question

hi. i have this really basic class and all it does is create a button...i have another class called main where i want to put the button on the stage...problem is it all compiles but can't get the button to display...help would be greatly appreciated. thanx
public class Main extends Sprite
public function Main()
var button1:ButtonPut = new ButtonPut();
addChild(button1)
package as_files.list
import flash.display.Sprite;
import spark.components.Button;;
public class ButtonPut extends Sprite
public function ButtonPut()
var but:Button = new Button();
but.x=100;
but.y=100;
but.width=100;
but.height=100;
addChild(but);

Answer 1

Here is another thread that touches this issue:
http://forums.adobe.com/thread/734266?tstart=0
A guy references this blog:
http://seeing-is-believing.blogspot.com/2007/11/flex-components-in-flash-example-with.html