Need Your help About TLFTextField Can't be load picture in Flash CS5

I write code like this . but DynamicText is run , TLFTextField dosn't work only have text show .
left is TLFTextField , Pictures can not show . right is DynamicText , it's work .

I'm using Flash cs5 .

code:

// ***************************************************

import fl.text.TLFTextField;
import flashx.textLayout.formats.TextLayoutFormat;
import flashx.textLayout.elements.TextFlow;

var source:String ="Abcd <IMG SRC='images/1_wilma.png' width='123' height='180'/> DEF";

var myTLFTextField:TLFTextField = new TLFTextField();
  addChild(myTLFTextField);
  myTLFTextField.x = 10;
  myTLFTextField.y = 10;
  myTLFTextField.width = 300
  myTLFTextField.height = 500;
  myTLFTextField.htmlText = source;

DynamicText.htmlText = source;

// ***************************************************