charset concrete vhost

[jviure]

Hello! I've an VPS with Plesk 9 and the default charset of my server is ISO-8859-1. Now I've to import a site with utf-8 encoding, I've tried to modify the file /var/www/vhosts/domain/conf/httpd.include as


<virtualhost XX.XX.XX.XX:443>

..
AddDefaultCharset utf-8
..

</virtualhost>

I've modified the .htaccess too without non exit, I see the non english characters as "almacén" (almacén) for example . Do you know what can I do? many thanks from spain!

Jordi