gii doesn't work well with nginx & php-fpm

Environment: CentOS 6.3 64-bit, Niginx 1.2.2, php 5.3.15, yii 1.1.11

Problem: I created a webapp by yii successfully and also can open gii login page. Bug when I enter the right password and press “Enter” button, nothing happens, I mean no error message, no conspongding page jumping. When I changed the ESID & EUID of php-fpm(/etc/php-fpm.d/www.conf) from nginx to apache, I can login gii succesfully. Default ESID & EUID are apache, but I don’t want that, I only want nginx.

Can you help me ?

I have solve the problem by change the php session folder privilege