проблема с запуском nginx

[truper]

При старте выдает вот такую ошибку..
пишу через service start 
starting nginx: [emerg]: the invalid "server_name" parameter in
/etc/nginx/sites-enabled/serb.net:3
вот мой конфиг вирт. хоста 

server {
listen 80;
server_name serb.net;
access_log /var/log/nginx.access_log;
location ~*
\.(jpg|jpeg|gif|png|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|tar|wav|bmp|rtf|swf|ico|flv|txt|xml|docx|xlsx)$
{
root /var/www/serb.net/;
index index.html index.php;
access_log off;
expires 30d;
}
location ~ /\.ht {
deny all;
}
location / {
proxy_pass http://127.0.0.1:81/;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-for $remote_addr;
proxy_set_header Host $host;
proxy_connect_timeout 60;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_redirect off;
proxy_set_header Connection close;
proxy_pass_header Content-Type;
proxy_pass_header Content-Disposition;
proxy_pass_header Content-Length;
}
}

Posted at Nginx Forum: http://forum.nginx.org/read.php?21,182186,182186#msg-182186