Nginx return empty (no replies)

I hava a website on a remote server and set the nginx servername "xiangyingdu.com abc.com"
server{
listen 80;
server_name xiangyingdu.com abc.com;
... ...
... ...
}

I set host in my local pc.
115.12.**.** xiangyingdu.com
115.12.**.** abc.com

Then I visit abc.com is OK, but the xiangyingdu.com always return code "200 0"

125.**.**.130 - - [24/Aug/2013:00:39:08 +0800] "GET / HTTP/1.1" 200 0 "-" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; QQDownload 718; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)"

Now I don't know what wrong is....