The first, i'm sorry about my bad English

I have 4 machines runing on Centos 6.5 64bit with Kloxo-MR 6.5.0:
Portal + dns server at 192.168.4.20,
Mail server at 192.168.4.21,
Web server (Nginx) at 192.168.4.18,
Mysql server at 192.168.4.22.
When i create a domain "demo.com" for demo client, i access it via web browser and it shows "This is the Kloxo-MR Default Page for demo.com". Everything right but when i upload a php file, it show "502 bad gateway".
This is nginx error log :
*63 connect() to unix:/home/php-fpm/sock/.sock failed (2: no such file or directory) while connecting to upstream, client: 192.168.4.20, server: _, request: "GET /favicon.ico HTTP/1.1", upstream: " fastcgi://unix:/home/php-fpm/sock/.sock:", host :"www.demo.com"
This is php-fpm error log :
ERROR: unable to read what child say: Bad file descriptor
I locate to /home/php-fpm/sock/ and don't see demo.sock, it must be here . Can i create it manually by hands ? Or other sollution ?
Happy Valentine Day and best wishes for everyone
