I setup my nginx and php-fpm for separate sockets and I get :
2013/12/01 03:59:12 [crit] 1201#0: *5 connect() to unix:/var/run/php5-fpm/forums.socket failed (2: No such file or directory) while connecting to upstream, client: 173.245.53.199, server: forums.DOMAIN.DOM, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm/forums.socket:", host: "forums.DOMAIN.DOM", referrer: "http://forums.DOMAIN.DOM/"
the directory /var/run/php5-fpm/ is there but ngnix or php-fpm doesn't spawn the sockets in.

here is my nginx.conf:
http://paste.ubuntu.com/6502039/

here is my /etc/nginx/sites-available/forums
http://paste.ubuntu.com/6502045/

here is my /etc/nginx/fastcgi_params
http://paste.ubuntu.com/6502055/

here is my /etc/php5/fpm/pool.d/forums.conf
http://paste.ubuntu.com/6502073/