Add movieclips within another movieclip - actionscript-3

Question

I am having trouble embedding a child object to a movieClip with code using AS3 and I am not sure what I am doing wrong.
I am trying to create a new movieclip with code and add it to the stage. I am then trying to embed dynamically created objects inside that movieclip. When I trace the objects it shows that they are on the stage and not embedded into the movieclip. I looked through the forums but I didn't find an answer. Below is a watered down version of the code I have. Any help is appreciated.
import flash.display.MovieClip;
import flash.events.Event;
import flash.display.Sprite;
import flash.text.*;
import flash.net.URLRequest;
import flash.display.Loader;
var btnAImage:Loader = new Loader();
var image:URLRequest = new URLRequest("btn_A.png");
public function TextWithImage()
{
var TextField1:TextField = new TextField;
var myText1:String = "TEXT FIELD 1";
var BtnMovieClip:MovieClip = new MovieClip();
var btnPadding = 5;
addChild(BtnMovieClip); //add new MC to stage
btnAImage.load(image);
BtnMovieClip.addChild(btnAImage); // no error gets thrown. I am trying to add the btnAImage inside of my BtnMovieClip.
btnAImage.x = btnPadding; //I am able to reference the btnAImage without referencing the BtnMovieClip object.
btnAImage.y = btnPadding;
var screenW = stage.stageWidth;
TextField1.height = 40;
TextField1.width = 250;
var textPadding = 5;
var TextField1_fontFormat:TextFormat = new TextFormat ;
TextField1_fontFormat.size = 40;
TextField1_fontFormat.font = "TestFont";
TextField1.defaultTextFormat = TextField1_fontFormat;
BtnMovieClip.addChild(TextField1); // no error gets thrown. I am trying to add the text field inside of my BtnMovieClip.
TextField1.text = myText1;
TextField1.x = (btnAImage.width + textPadding);
TextField1.y = textPadding;
}

Answer 1

I wasn't preloading my image so here's how I fixed it. Thank you to Organis for the help!!!
public var btnAImage:Loader;
private function Question8_Answer()
{
trace("Question8_Answer() was called");
btnAImage = new Loader();
btnAImage.load(new URLRequest("btn_A.png"));
btnAImage.contentLoaderInfo.addEventListener(Event.COMPLETE, TextWithImage);
}
public function TextWithImage()
{
var TextField1:TextField = new TextField;
var myText1:String = "TEXT FIELD 1";
var BtnContainer:Sprite = new Sprite();
var btnPadding = 5;
addChild(BtnMovieClip);
BtnMovieClip.addChild(btnAImage);
btnAImage.x = btnPadding;
btnAImage.y = btnPadding;
var screenW = stage.stageWidth;
TextField1.height = 40;
TextField1.width = 250;
var textPadding = 5;
var TextField1_fontFormat:TextFormat = new TextFormat ;
TextField1_fontFormat.size = 40;
TextField1_fontFormat.font = "TestFont";
TextField1.defaultTextFormat = TextField1_fontFormat;
BtnMovieClip.addChild(TextField1); // no error gets thrown. I am trying to add the text field inside of my BtnMovieClip.
TextField1.text = myText1;
TextField1.x = (btnAImage.width + textPadding);
TextField1.y = textPadding;
BtnContainer.width = 300;
}