Apparently the fonts are old Type 1 fonts. I found this at Adobe which could address your issue:
http://www.adobe.com/type/opentype/T1_to_OTF_FAQ.htm
I don't know enough about fonts to be clear on what can be embedded, but some proprietary fonts can only be used on your computer, and not embedded elsewhere. That would be like giving away copyrighted material.
As Harry suggested, it appears you will have to use other fonts.