Plesk + Nginx shows wrong 404 page

[MattiaM]

Plesk + Nginx shows wrong page

Hi folks,
I'm running a Parallels Plesk Panel v11 on os_CentOS with Nginx.

The server must show a "Default Parallels Plesk Panel Page" when a "error" occured.

Now, when I have this kind of error, Nginx sends a customized page of one of my vhosts.

I tryed to rebuilding the vhosts but nothing is change.
If Nginx is stopped the server answer is correct, with page "Default Parallels Plesk Panel Page".

How can i fix it?

Thanks in advance to all.