No Available nginx Directive Snippets

Hello,

I was adding / edit my vhosts manually and faced a problem after rebooting my server, the all disappeared.

So after some readings, I found, I need to add websites in ISPConfig and edit vhosts through ISPConfig in "Options" tab.

I'd like to use ngx_pagespeed (already installed) but when I want to add nginx Directives :

Code:

pagespeed MemcachedThreads 1;
pagespeed MemcachedServers "localhost:11211";

and hit Save button, nothing is added in the vhost conf file (domainxxxx.vhost)

When I go back to ISPConfig Option tab, I see the directives are there, but .vhost remains unchanged.

On the right of the field I see this :

Code:

Available nginx Directive Snippets:

 ------

Does anything needs to be displayed there instead of ------- ?

My server :

Followed this tutorial : Perfect server ispconfig + nginx

Thanks in advance for your help !

EDIT :

OK, after going to : Tools > Sync Tools > Resync > Check Resync Websites
The Directives showed up in the .vhost conf file...