error directive help with 404

[robinsonc494]

Hi all,
I've just moved from an apache2 server and i'm trying to set up nginx.

Its installed, compiled from source and running fine.
In the process of fine tuning my setup i noticed  my 404's aren't doing what i want.

I have my wordpress blog setup with php-fpm for php

when a 404 happens on a file with .html or /no-existent-url
the 404 does what i expect and wordpress handles it with my custom page.

if i enter domain.com/somepage.php i get the nasty default page that browsers server.
in I.E especially 

my server config looks like this

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

           try_files $uri $uri/ /index.php?q=$uri&$args;
        #error_page 404  /index.php?error=404;
        location / {
            root  /usr/share/nginx/html;
            index  index.html index.htm index.php;
        if (!-e $request_filename) {
        rewrite ^ /index.php last;
        }
        error_page  404              /swf/404.php;
      location = /swf/404.php {
        root   /usr/share/nginx/html;
      }


        }
I've searched about and found examples of the error_page directive being used not specifically for a 404 but i assumed its the same.
It doesn't seem to work though.
Can anyone help me please?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,91680,91680#msg-91680