Rewrite or internal redirection cycle?

[muhfiasbin]

I get the same problem with TECK
The difference is my homepage is work well, but when I tried to click a
link on my homepage, it's get me 500 Internal Server Error.

Here my configuration:

if (-f $document_root/maintenance.html) {
        rewrite  ^(.*)$  /maintenance.html last;
        break;
    }

    location / {
        error_page 404 = //index.php?q=$uri;
        try_files $uri $uri/ /index.php?q=$request_uri;
    }

    location /administrator/ {
        rewrite  ^(.*)$  https://www.domain.com$1 permanent;
    }

    if ($request_uri ~* "com_login") {
        rewrite  ^(.*)$  https://www.domain.com$1 permanent;
    }

    location /en/ {
        index index.php;
        error_page 404 = //index.php?q=$uri;
        if (!-e $request_filename) {
            rewrite ^/en/(.*)$ /en/index.php?$1 last;
            break;
        }
    }

    location /en/administrator/ {
        rewrite  ^(.*)$  https://www.domain.com$1 permanent;
    }

    location ~ \.php {
        fastcgi_pass 127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_param  SCRIPT_FILENAME
$document_root$fastcgi_script_name;
        include /usr/local/nginx/conf/fastcgi_params;

and some output from error_log :

2011/06/15 19:41:54 [error] 1985#0: *208 rewrite or internal redirection
cycle while internal redirect to "//index.php", client: 66.249.72.65,
server: www.domain.com, request: "GET /agenda.html HTTP/1.0", upstream:
"fastcgi://127.0.0.1:9000", host: "www.domain.com"
2011/06/15 19:41:55 [error] 1985#0: *213 rewrite or internal redirection
cycle while internal redirect to "//index.php", client: 203.130.206.49,
server: www.domain.com, request: "GET /diploma.html HTTP/1.0", upstream:
"fastcgi://127.0.0.1:9000", host: "www.domain.com", referrer:
"http://www.domain.com/"

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,199260,207142#msg-207142