Mail form (Flash+PHP) with Unicode

Hello, guys.
I’m developing a flash form integrated with PHP, but somehow it truncates special characters (such as á, é, ç, ã, õ etc., the case of portuguese language).
I’ve zipped the PHP and FLA files into http://www.suvacadiprata.org/teste/mailformplusunicode.zip

I hope you can give me some enlightenment.

Força e paz,
morocoh