以下是nginx配置，重启也没有报错，但是443接口并没有启动，想知道为什么？

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;


    server {
        listen       80;
        server_name xx.com  www.xx.com;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
         proxy_pass http://127.0.0.1:9339;
        #root   /;
            #index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$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;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    server {
        listen       80;
    #    listen       somename:8080;
        server_name  myterm.xx.com;

        location / {
    #        root   html;
    #        index  index.html index.htm;
    proxy_pass  http://www.yozosann.com:8256/;
        }
    }


    # HTTPS server
    #
    server {
         listen       443;
         server_name  xx.com  www.xx.com;

         ssl                  on;
         ssl_certificate      /usr/local/nginx/ssl/www.xx.com-ca-bundle.crt;
         ssl_certificate_key  /usr/local/nginx/ssl/www.xx.com.key;

         ssl_session_timeout  5m;

         ssl_protocols  SSLv2 SSLv3 TLSv1;
         ssl_ciphers  HIGH:!aNULL:!MD5;
         ssl_prefer_server_ciphers   on;

        location / {
             proxy_pass http://127.0.0.1:9339;
    #        root   html;
    #        index  index.html index.htm;
         }
     }

}