Install Page Speed Google Nginx

Good evening,
I have a problem in operating the module PageSpeed with Nginx reverse.
I use
Plesk 12/05/30
Centos 6.7
Php 5.6.14 performed by FPM by Nginx
I installed the module via yum install mod-PageSpeed-beta-1.9.32.10-7423.x86_64
But it does not work properly.
I tried to add the string "pagespeed on" in nginx.conf but does not work
How can I do?
Thank you
Best regards