Class file font ebmeding

I’m trying to embed in my class file and I’m following these instruction
http://www.adobe.com/devnet/flash/articles/embed_metadata_04.html
But have the flowing error message:

VerifyError: Error #1014: Class mx.core::FontAsset could not be found.
ReferenceError: Error #1065: Variable FontClass_theClass is not defined.
ReferenceError: Error #1065: Variable MainTimeline is not defined.

I’ve search in google for some solutions but didn’t found anything. Can you help me.
Thank you