Domain mapping get no response

Hello,

I have installed the domain mapping plugin. When the first time to mapping domain name in sub-sites, the page got a blank page after press the button.

The error report :
014/11/07 17:15:25 [error] 4860#0: *765 FastCGI sent in stderr: "PHP message: PHP Warning: include_once(/var/www/wordpress/wp-content/sunrise.php): failed to open stream: No such file or directory in /var/www/wordpress/wp-includes/ms-settings.php on line 18
PHP message: PHP Warning: include_once(): Failed opening '/var/www/wordpress/wp-content/sunrise.php' for inclusion (include_path='.:disappointed:usr/share/pear:disappointed:usr/share/php') in /var/www/wordpress/wp-includes/ms-settings.php on line 18" while reading response header from upstream,

However, the file is in the dir :
[root@localhost wp-content]# ls -l
??? 28
-rwxr-xr-x 1 nginx nginx 28 1? 9 2012 index.php
drwxr-xr-x 4 nginx nginx 4096 9? 5 08:21 languages
drwxr-xr-x 24 nginx nginx 4096 11? 7 17:19 plugins
-rwxr-xr-x 1 nginx nginx 489 11? 7 17:14 sunrise.php
drwxr-xr-x 6 nginx nginx 4096 11? 7 14:53 themes
drwxr-xr-x 2 nginx nginx 4096 11? 7 17:14 upgrade
drwxr-xr-x 3 nginx nginx 4096 11? 7 15:50 uploads

Please help me. Thanks!

Regards,
James H.