nginx problem host

server {
listen 80;
server_name xenti.org www.xenti.org;
access_log /home/xenti/logs/nginx_access.log;
error_log /home/xenti/logs/nginx_error.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|docx|xlsx)$ {
root /home/xenti/www/;
index index.html index.php;
access_log off;
expires 30d;
}
location ~ /\.ht {
deny all;
}

location / {
proxy_pass http://127.0.0.1:8080/;
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;
}
}