Ok thanks Valloric and gwynevans. Thanks a lot
I've changed the main font and I used Cambria that, although it was ttf from the very beginning, its icon was open type and that was driving me crazy. After reading your messages I decided to flash with that font despite de damn icon.
And it worked perfectly. I only had to follow appendix C because my reader was previously modified and followed your instructions.
I love the font. Cambria is a friendly smooth font and I reccomend it.