Php email form on nginx - php

Question

I have a static html page that has a php form to send an email, the server is nginx and site loads as expected however when I attempt to send an email via the form I get a 404 error,
in the console; POST http://example.com/form-handler.php 404 (Not Found)
and the nginx error.log;
2014/04/07 14:31:19 [error] 10199#0: *48 open()
"/home/deployer/example/current/404.html" failed (2: No such file or
directory), client: 86.131.120.178, server: example.com, request:
"POST /form-handler.php HTTP/1.1", host: "example.com", referrer:
"http://example.com/"
this is my nginx conf for the site;
server {
listen 80;
root /home/deployer/example/current;
index index.php index.html index.htm;
server_name example.com www.example.com;
location / {
try_files $uri $uri/ /index.html;
}
error_page 404 /404.html;
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/www;
}
location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
expires 365d;
}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
location ~ \.php$ {
try_files $uri =404;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
}
I don't know why it cant find the form...