FrameMaker versions earlier than FrameMaker 8 do not support Unicode. If you are not working in a Western language, unless you have FrameMaker version 8 or later, you need to use FrameMaker fonts that have your national subset in the “high ASCII” code points (characters with values greater than 0x7F (decimal 127), constitute the “high ASCII” set). Mif2Go must then convert those code-point values to the Unicode values.