500 nginx bad gateway when Update vbulletin template

[iLinux85]

and here is the nginx configurations for the site


server {
          error_log /var/log/nginx/vhost-error_log warn;
          listen 192.168.1.1:80;
          server_name site.com www.site.com;
          access_log /usr/local/apache/domlogs/site.com-bytes_log
bytes_log;
          access_log /usr/local/apache/domlogs/site.com combined;
          root /home/deltacom/public_html;
          location / {
          location
~.*\.(3gp|gif|jpg|jpeg|png|ico|wmv|avi|asf|asx|mpg|mpeg|mp4|pls|mp3|mid|wav|swf|flv|html|htm|txt|js|css|exe|zip|tar|rar|gz|tgz|bz2|uha|7z|doc|docx|xls|xlsx|pdf|iso)$
{
          expires 7d;
          try_files $uri @backend;
          }
          error_page 405 = @backend;
          add_header X-Cache "HIT from Backend";
          proxy_pass http://192.168.1.1:8081;
          include proxy.inc;
          }
          location @backend {
          internal;
          proxy_pass http://192.168.1.1:8081;
          include proxy.inc;
          }
          location ~ .*\.(php|jsp|cgi|pl|py)?$ {
          proxy_pass http://192.168.1.1:8081;
          include proxy.inc;
          }
          location ~ /\.ht {
          deny all;
          }
        }

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,230591,230592#msg-230592