Text Field not defined?

programming flash
1 
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[LEFT]<?xml version="1.0" encoding="utf-8"?>[/LEFT]
[/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff][LEFT]<mx:Application[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2] xmlns:mx="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]http://www.adobe.com/2006/mxml[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]" layout="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]absolute[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]"[/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]>[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][LEFT]
[/SIZE][SIZE=2][COLOR=#006633][SIZE=2][COLOR=#006633]<mx:Script>[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][LEFT]<![CDATA[
myText.text = [/SIZE]**[SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]"This is not text"**[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2];
]]>
[/SIZE][SIZE=2][COLOR=#006633][SIZE=2][COLOR=#006633]</mx:Script>[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2] 
[/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]<mx:Text[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2] id="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]myText[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]" width="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]133[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]" x="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]108[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]" y="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]75[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]" text="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]This is text[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]" enabled="[/SIZE][SIZE=2][COLOR=#990000][SIZE=2][COLOR=#990000]true[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2]"[/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]>[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][LEFT][/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]</mx:Text>[/LEFT]
[/COLOR][/SIZE][/COLOR][/SIZE][SIZE=2][LEFT][/LEFT]
[/SIZE][SIZE=2][COLOR=#0000ff][SIZE=2][COLOR=#0000ff]</mx:Application>

The actionscript I put in should change what’s inside the text field. Where have I gone wrong?
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