ubuntu14.04 LNMP环境，安装成功后，注册时404，项目目录权限777，求助，怎么配置nginx，才能启动rewrite，现在nginx配置贴在下边了

server {
listen 80 default_server;
listen [::]:80 default_server ipv6only=on;
root /home/misaeng/Documents/;
index index.html index.htm index.php;
# Make site accessible from http://localhost/
server_name localhost;
error_page 404 /404.php;
#carbon forum 5.6.1 nginx configuration rewrite 重定向配置
if (!-e $request_filename){
                rewrite ^/(.*)/dashboard /$1/dashboard.php last;
                rewrite ^/(.*)/forgot /$1/forgot.php last;
                rewrite ^/(.*)/favorites(/page/([0-9]*))? /$1/favorites.php\?page=$3 last;
                rewrite ^/(.*)/goto/([0-9]+)-([0-9]+) /$1/goto.php\?topic_id=$2&post_id=$3 last;
                rewrite ^/(.*)/json/([0-9a-z_\-]+) /$1/json.php\?action=$2 last;
                rewrite ^/(.*)/login(.*) /$1/login.php$2 last;
                rewrite ^/(.*)/manage /$1/manage.php last;
                rewrite ^/(.*)/new /$1/new.php last;
                rewrite ^/(.*)/notifications /$1/notifications.php last;
                rewrite ^/(.*)/oauth-([0-9]+) /$1/oauth.php\?app_id=$2 last;
                rewrite ^/(.*)/page/([0-9]+) /$1/index.php\?page=$2 last;
                rewrite ^/(.*)/register(.*) /$1/register.php$2 last;
                rewrite ^/(.*)/reply /$1/reply.php last;
                rewrite ^/(.*)/reset_password/(.*) /$1/reset_password.php\?access_token=$2 last;
                rewrite ^/(.*)/robots.txt /$1/robots.php last;
                rewrite ^/(.*)/search.xml /$1/open_search.php last;
                rewrite ^/(.*)/search/([^/]*)(/page/([0-9]*))? /$1/search.php\?keyword=$2&page=$4 last;
                rewrite ^/(.*)/settings /$1/settings.php last;
                rewrite ^/(.*)/sitemap-(topics|pages|tags|users|index)(-([0-9]+))?.xml /$1/sitemap.php\?action=$2&page=$4 last;
                rewrite ^/(.*)/statistics /$1/statistics.php last;
                rewrite ^/(.*)/t/([0-9]+)(-([0-9]*))?(.*) /$1/topic.php\?id=$2&page=$4 last;
                rewrite ^/(.*)/tag/([^/]*)(/page/([0-9]*))? /$1/tag.php\?name=$2&page=$4 last;
                rewrite ^/(.*)/tags/following(/page/([0-9]*))? /$1/favorite_tags.php\?page=$3 last;
                rewrite ^/(.*)/tags(/page/([0-9]*))? /$1/tags.php\?page=$3 last;
                rewrite ^/(.*)/u/(.*) /$1/user.php\?username=$2 last;
                rewrite ^/(.*)/users/following(/page/([0-9]*))? /$1/favorite_users.php\?page=$3 last;
                rewrite ^/(.*)/upload_controller(.*) /$1/upload_controller.php$2 last;
                rewrite ^/(.*)/view-(desktop|mobile)\?(.*) /$1/view.php\?view=$2&$3 last;
}
location / {
# First attempt to serve request as file, then
# as directory, then fall back to displaying a 404.
#try_files $uri $uri/ =404;
try_files $uri $uri/ /index.php?$query_string;
# Uncomment to enable naxsi on this location
# include /etc/nginx/naxsi.rules
}
#try_files $uri $uri/ /index.php?$query_string;
# Only for nginx-naxsi used with nginx-naxsi-ui : process denied requests
#location /RequestDenied {
#proxy_pass http://127.0.0.1:8080;    
#}
#error_page 404 /404.php;
 #/404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
#location = /50x.html {
#root /usr/share/nginx/html;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
location ~ \.php$ {
#fastcgi_split_path_info ^(.+\.php)(/.+)$;
## NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
#
## With php5-cgi alone:
#fastcgi_pass 127.0.0.1:9000;
## With php5-fpm:
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
#deny all;
#}
# Git folder vulnerability
location /.git {
        deny all;
}
}