AS3: Embedding characters - actionscript-3

Question

I having some trouble with TextFields and caracter embedding. As I have understood, the way to embed character in Flash, is to have a TextField in a movieclip that is exported to actionscript via some classname. Then have the TextField embed the characters.
But when i try to use that TextField in my project, I cannot auto resize the field any longer!? Is there a better way to embed charactes? or am I missing some unknow attribute? (and yes i have tried TextField.autoSize = "left" (or "center" or "right")).
The TextField is configured like this in Flash CS4:
Properties:
http://screencast.com/t/0VB6KnNO6G
Library implementation:
http://screencast.com/t/w3yQLqit0veI
And I embed the MovieClip containing the TextField like this:
protected var tabname:MovieClip = new Text(); // The property on the object
Adding the text and setting its Settings:
var txt:TextField = tabname.txt;
if( !contains(tabname) )
{
addChild(tabname);
var format:TextFormat = new TextFormat();
format.bold = true;
format.font = "Arial";
format.size = 12;
format.align = "left";
var dropShadow = new DropShadowFilter(0);
dropShadow.color = 0xFFFFFF;
dropShadow.strength = 2;
dropShadow.blurX = dropShadow.blurY = 5;
dropShadow.alpha = .7;
txt.type = TextFieldType.DYNAMIC;
txt.multiline = tabname.wordWrap = false;
txt.autoSize = TextFieldAutoSize.LEFT;
txt.defaultTextFormat = format;
txt.filters = [dropShadow];
txt.mouseEnabled = false;
txt.x = 10;
}
txt.text = value;
txt.y = Math.ceil((tabmask.height - txt.height) /2);

Answer 1

To embed fonts, don't rely on wrapping them in MovieClips in the library. They should be embedded correctly as Fonts. I have included some basic steps below for embedding fonts, then an example for your particular situation:
1 - Make the textfield Dynamic and click the Embed.. button
2 - Name the font with something meaningful (like the fonts name) and tick the character sets you will be using (usually I select caps, lowercase, numbers and punctuation). Also note the Style is 'Bold', you will need to embed a font set for each style. So if you want to use Bold and Regular, you need to embed 2 fonts.
3 - If you plan on adding textfields dynamically through ActionScript, goto the ActionScript tab and add a class for it (again, use a meaningful name)
4 - Finally click ok, and away you go. I have setup an example, using these steps, and the auto size method, you can see the results below

Answer 2

In Flash, you can click the [Embed...] button below the TextField's character properties. In the window that you get then, you can specify which characters you want embedded in your textfield.
There's a lot more to say about font embedding but this is the simple story. Flash CS5 added TLF TextFields but I don't think you were referring to those, right?
The autoSize property really has nothing to do with font embedding but I guess your TextField is not Dynamic when you cannot auto resize it?
Are you using CS5 or CS4 or earlier by the way?