help setting spellchecker to greek ?

Hello all
How can i set spell checker language to greek on load?
i have tried the folowing config options:

scayt_sLang : 'el', nothing happens
scayt_defLan : 'el', nothing happens
language : 'el' this is working ok but its for the interface

and
CKEDITOR.config.scayt_sLang ="el";

i have also tried el_GR gr_GR el_EL gr greek

nothing seems to work

* i can set the language if i click on the button and select languages->greek

thank you for any help

PS if i try another language everything works, ex pt-BR