proxy_pass Cannot GET

[youreright]

nginx is working, but, when doing proxy_pass, gives me: Cannot GET /nodejs
 
here are the lines I've added to nginx.conf
 
ProxyPass nodejs localhost:2345
ProxyPassReverse nodejs localhost:2345
 
2345 is where my node server is listening
 
I'm pointing chrome browser here:
http://localhost/nodejs
 
any ideas to fix it? web.js here is my node server:
http://plnkr.co/edit/ZdQqulPp4ovZqR9zikYm?p=preview
 
with apache ProxyPass[Reverse] this was working, but I'm trying nginx to see
performance gains

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,244100,244100#msg-244100