Everything works correctly below. The new button displays on stage, but the
nested dynamic text (instance name "campText") will not display.

1119: Access of possibly undefined property campText through a reference with
static type flash.display:SimpleButton.


Here's the short code:

import flash.display.SimpleButton;
import flash.display.*;
import flash.text.TextField;

var myButton:SimpleButton = new camp();
myButton.x = 350;
myButton.y = 100;
myButton.campText.text = "CAMP";
addChild(myButton);