strange condition file not found nginx with php-fpm

[ezak]

I was working with this config from 2 years without any problem

sudenly I face not found error message from niginx

and its come only when the link has "?", sample
http://firmware.gem-flash.com/index.php?a=browse&b=category&id=1

if open the normal link, its working
http://firmware.gem-flash.com/index.php
http://firmware.gem-flash.com/[any other php file].php

site config (changed user info)

server {
    listen *:80;
    server_name  firmware.gem-flash.com;
    #error_log   /var/log/nginx/firmware.gem-flash.com.log error;
    rewrite_log on;
                root   /home/user/public_html/;

    location / {
                index  index.php index.html index.htm ;
        }

         location ~*
^.+\.(jpg|jpeg|gif|css|html|png|js|ico|bmp|zip|rar|txt|pdf|doc)$ {
                root /home/user/public_html/;
                # expires max;
                access_log off;
        }


    location ~ ^/.+\.php {
        fastcgi_pass 127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_intercept_errors on;
        include /etc/nginx/fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_script_name;


        }


}

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,270104,270104#msg-270104