Wildcard for Wordpress multisite on Plesk 10

[triv]

Hi,
Im now using Plesk 10 with CenOS on my Dedicated Server at server4you.com.
I tried to create Wildcard for Wordpress multisite follow this guide http://codex.wordpress.org/Configuring_Wildcard_Subdomains_for_multi_site_under_Plesk_Control_Panel
However, nothing happened when I completed the work.

Please help me.
Regards,
Tri