Hi,

Because I found the right way to do that after I tested all kind of way to include a font in an actionscript 3 project with Flash Builder, here is the solution :

package
{
    import flash.text.TextField;
    import flash.text.TextFieldAutoSize;
    import flash.text.TextFormat;
    import flash.text.AntiAliasType;
 
    public class sample 
	{
 
           //Font
	   //Add in The Embed Tag :  embedAsCFF="false"
	   [Embed(source="Your_Font.otf",
                       fontName="myFont",
                       mimeType = "application/x-font",
                       unicodeRange="U+0020,U+0041-U+005A,U+0061-U+007A",
                       embedAsCFF="false" )]
	   private var font:Class;
 
           public function sample():void
           {
            var MyText:TextField = new TextField();
	    MyText.embedFonts = true;
	    MyText.wordWrap = false;
	    MyText.autoSize = TextFieldAutoSize.LEFT;
	    MyText.antiAliasType = AntiAliasType.ADVANCED;
	    MyText.text="My font Works !";
	    var MyTextFormat:TextFormat = new TextFormat("myFont",18,0xf0f0f0);
	    MyText.setTextFormat(MyTextFormat);  
           }
 
        }
 
}

I hope it will help.

Denis P.