ANT: charsets in replace-task

Hello everybody,

I have a problem with charsets, by using the "replace-task" of Ant in the Eclipse IDE.
After ant relaces a token  (the value of the token comes from a ".properties-file") in an xml-file, where the charset "UTF-8" is used (<?xml version="1.0" encoding="UTF-8"?>), some special characters (such as: ZàèìòùÀÈÌÒÙáéíóúýÁÉÍÓÚÝâêîôûÂÊÎÔÛãñõÃÑÕäëïöüÿÄËÏÖÜŸçÇåÅðÐøØ)  are not represented correctly and Eclipse is not able to show the content of this file after the replacement.
I have already changed the charset of all concerning files to "UTF-8", but it still doesn't work.

Is there a solution for this problem? maybe a way to tell the replace-task of ant to use the UTF-8 charset.  

Thank you,

Best Regards,

Arash