Embed OTF Font as CFF in Pure Actionscript Project using Flex SDK 4.0

Question

I want to apply the method explained here: http://www.insideria.com/2009/03/flash-text-engine.html using only the Flex SDK 4 (not using FlashBuilder)
Specifically:
Embedding fonts can be tricky. In Flex, embed the font and store it
using DefineFont4 and font subsetting currently only supported by Gumbo.
A future version of Flash will support it but in the meantime, a Gumbo
SWC with the embedded font must be created then adding to your Flash CS4
project.
The following is the method I am using to embed the fonts.
public class Main extends Sprite {
     [Embed(source="../assets/GE Thameen DemiBold.otf",
                              fontFamily = "GE Thameen",
                              fontWeight = "bold",
                              mimeType = "application/x-font",
                              embedAsCFF = "true"
     private const GEThameen:Class;
The following command line was assimilated after solving the output error messages using google and a little looking into how FlashDevelop works..
mxmlc Main.as -load-config config.xml -managers flash.fonts.AFEFontManager
The output SWF is not working as supposed, and the file size (20KB) does not seem to account for the embedded font. PS: When the font embedding is bypassed, and a device font is used for the text engine classes, the file works perfectly.
The contents of config.xml are as the following:
<?xml version="1.0" encoding="utf-8"?>
<!--This Adobe Flex compiler configuration file was generated by a tool.-->
<!--Any modifications you make may be lost.-->
<flex-config>
  <target-player>10.0.0</target-player>
  <compiler>
    <source-path append="true">
      <path-element>E:\actionscript</path-element>
    </source-path>
    <external-library-path>
        <path-element>C:\bin\flex_sdk_4\frameworks\libs\player\10.0\playerglobal.swc</path-element>
        <path-element>C:\bin\flex_sdk_4\frameworks\libs\flex.swc</path-element>
    </external-library-path>
  </compiler>
  <file-specs>
  </file-specs>
  <default-background-color>#FFFFFF</default-background-color>
  <default-frame-rate>30</default-frame-rate>
  <default-size>
    <width>800</width>
    <height>600</height>
  </default-size>
</flex-config>

Answer 1

After losing about 2-3 days to trying to figure this stuff out, I rolled back to build 4.5.0.19786 and the problem doesn't occur anymore.  I'll revisit this issue once we ship the product next week.
Thanks Alex.
Cheers,
Nate Beck