Site web sur le serveur nginx demandé à partir du sous-répertoire

Nous avons deux serveurs nginx. Le premier serveur reçoit une requête via www.example.com/partner . Il envoie la requête complète au second serveur qui a configuré php+fastCgi. Journal d'accès Nginx du second serveur :

"GET /partenaire/ HTTP/1.0" 200 2845

Sur le second serveur, j'ai un serveur virtuel qui ressemble à ça :

server {
       listen my.ip:80;
       server_name www.example.com;
       root /var/www/example;

       if ($http_host != "www.example.com") {
                 rewrite ^ http://www.example.com$request_uri permanent;
       }

       index index.php index.html;

       location = /partner/favicon.ico {
                log_not_found off;
                access_log off;
                expires max;
       }

        location @nocache {
                try_files $uri $uri/ /index.php?$args;
       }
       location = /partner/robots.txt {
                allow all;
                log_not_found off;
                access_log off;
       }

       location ^~ /partner/typo3temp/tx_ncstaticfilecache {
                expires 43200;
                charset utf-8;
       }

       location = /partner/clear.gif {
                empty_gif;
                expires max;
       }
       location ^~ /partner/typo3/gfx {
                expires max;
       }
       location ^~ /partner/typo3temp/compressor {
                expires max;
       }   

    location /partner {    

                if ($query_string ~ ".+") {
                        return 405;
                }
                # pass requests from logged-in users to PHP
                if ($http_cookie = 'nc_staticfilecache|be_typo_user' ) {
                        return 405;
                } # pass POST requests to PHP
                if ($request_method !~ ^(GET|HEAD)$ ) {
                        return 405;
                }
                if ($http_pragma = 'no-cache') {
                        return 405;
                }
                if ($http_cache_control = 'no-cache') {
                        return 405;
                }
                error_page 405 = @nocache;

                # serve requested content from the cache if available, otherwise pass the request to PHP
                try_files /typo3temp/tx_ncstaticfilecache/$host${request_uri}index.html @nocache;

       location ~* \.(sql|htaccess|htpasswd|tpl|html5|xhtml) {
                deny all;
       }

       location ~*  \.(jpg|jpeg|png|gif|css|js|ico)$ {
                expires max;
                log_not_found off;
       }

       location ~* \.(cur|ico|gif|png|jpe?g|css|js|swf|woff)((\?\d\d\d\d\d\d\d\d\d\d)|(\?s=\d\d\d\d\d\d\d\d\d\d))$ {
                expires max;
                log_not_found off;
       }
       location ~* \.(cur|ico|gif|png|jpe?g|css|js|swf|woff)(\?v\d\d?\.\d\d?\.\d\d?)$ {
                expires max;
                log_not_found off;
       }
       location ~* ^(/typo3/sysext|/typo3conf/ext).*\.(cur|ico|gif|png|jpe?g|css|js|swf|woff) {
                expires max;
                log_not_found off;
       }

       location ~ /\. {
                deny all;
                access_log off;
                log_not_found off;
       }

       location ~ \.php$ {
                try_files $uri =404;
                include /etc/nginx/fastcgi_params;
                fastcgi_pass 127.0.0.1:9000;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                fastcgi_index index.php;
       }
    }
}

Le problème est que l'index.php n'est pas interprété, il est plutôt téléchargé. Une idée de ce qui ne va pas ?