php + fastcgi

[deniswork at uzvik.kiev.ua]

Запускаю:
/usr/local/bin/spawn-fcgi -a 127.0.0.1 -s /tmp/fphp.sock  -u www-data -f php-cgi

в конфиге:
    server {
        listen          192.0.0.1:81;
        location / {
                proxy_pass      http://unix:/tmp/fphp.sock:/;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME /var/www/site.com/www$fastcgi_script_name;
        }
    }

но получаю: 502 Bad Gateway

а в логе:
2007/04/10 01:07:34 [error] 15460#0: *1118317 recv() failed (104:
Connection reset by peer) while reading response header from upstream,
client: 192.0.0.2, server: site.com, URL: "/index.php", upstream: "http://unix:/tmp/fphp.sock:/index.php", host: " 192.0.0.1:81"

Подскажите как исправить.

Спасибо.