Problems with proxy

I have created a subdomain, which will connect to another webside for
the “data”, and Im trying to do that with proxy_pass, but when I am
trying out, always the subdomain will redirect me to the actually
website from where I wanna get the “data”

The subdomain conf is this:

server {
listen 80;
server_name sys.example.org *.sys.example.org;

access_log /var/log/nginx/sys-access_log;
error_log /var/log/nginx/sys-error_log info;

location / {
root /srv/www/example.org;
index index.php index.html index.htm;
}

location / {
proxy_pass http://www.example.net/system;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

#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 /var/www/nginx-default;
}

}

Please let me know what Im doing wrong.