Thank you very much dear amber222 (please be patient with my English).
I made exactly as you said, I translated the English php file to greek, and also changed the (charset=iso-8859-1) to (charset=iso-8859-7).
All seems ok, when I press preview I can still read my Greek post, but when I submit the message looks like this (?????????????????????)
I don’t know why.
Anyway you can see that if you want at: http://www.dogs.freegr.net/guestbook/index.php Thank you very much again