VPS nging - wordpress rich permlinks not working

I have VPS with nginx and have some subdomains there. Mostly Wordpress website and one Magento. Magento website is working fine but wordpress cant use rich permlinks. I am getting Server error. Can you please tell me what configuration file to use?

This is my file in etc/nginx/sites-enabled/wordpress

server {
    listen 80;

    server_name qbfweb.com;
    root /var/www/qbfweb.com;

    ## rewrite example.com to www.example.com
    if ($http_host != "qbfweb.com") {
        rewrite ^ $scheme://qbfweb.com$request_uri permanent;
    }

    location / {
        index index.html index.php; ## Allow a static html file to be shown first
        try_files $uri $uri/ @handler; ## If missing pass the URI to Magento's front handler
        expires 30d; ## Assume all files are cachable
    }

    ## Locations should be hidden
    location /app/                { deny all; }
    location /includes/           { deny all; }
    location /lib/                { deny all; }
    location /media/downloadable/ { deny all; }
    location /pkginfo/            { deny all; }
    location /report/config.xml   { deny all; }
    location /var/                { deny all; }

    location /var/export/ { ## Allow admins only to view export folder
        auth_basic           "Restricted"; ## Message shown in login window
        auth_basic_user_file /var/www/.htpasswd; ## See /etc/nginx/htpassword
        autoindex            on;
    }

    ## Disable .htaccess and other hidden files
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    location @handler { ## Magento uses a common front handler
        rewrite / /index.php;
    }

    location ~ .php/ { ## Forward paths like /js/index.php/x.js to relevant handler
        rewrite ^(.*.php)/ $1 last;
    }
    location ~ .php$ { ## Execute PHP scripts
        if (!-e $request_filename) { rewrite / /index.php last; } ## Catch 404s that try_files miss

        expires        off; ## Do not cache dynamic content
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        fastcgi_param  MAGE_RUN_CODE default; ## Store code is defined in administration > Configuration > Manage Stores
        fastcgi_param  MAGE_RUN_TYPE store;
        include        fastcgi_params; ## See /etc/nginx/fastcgi_params
    }
}