Diacritic in the validation messages

Hello,
if I write 'message' => 'aeiou' CakePHP displayed message,
but if I write 'message' => 'áéíóú' CakePHP not displayed message.

Do you know how to solve it?

--
You received this message because you are subscribed to the Google Groups "CakePHP" group.
To post to this group, send email to cake-php@googlegroups.com.
To unsubscribe from this group, send email to cake-php+unsubscribe@googlegroups.com.
Visit this group at http://groups.google.com/group/cake-php?hl=en-US.