Format Date in Spanish

How to configure the date in the server to view format in Spanish language ?.
setlocale no works fine in php.


Sample:
<?
setlocale(LC_ALL, 'esp');
echo strftime("%A %e %B %Y", mktime(0, 0, 0, 12, 22, 2006)) ;
?>
return = Friday 22 December 2006

I like = viernes diciembre 2006

This sample run O.K. in other server.


I have tested setlocale 'es_es.iso-8859-1' - 'es-ESP' - 'es_ES' - 'es-ES' - 'es_ES@euro' . but none works well

Some suggestion ?

(ISPConfig. 2.2.5, PHP 4.3.10.16, Apache2)

Thanks.

 

Which date? Where? Maybe you can post a screenshot?