request webservice error

[xunianchong]

nginx config

server {
resolver 8.8.8.8 ipv6=off; #指定DNS服务器IP地址
listen 8881;
proxy_connect;
proxy_connect_allow 443 563;
proxy_connect_connect_timeout 10s;
proxy_connect_data_timeout 10s;
location / {
proxy_pass http://$host;
proxy_set_header Host $host;
}
}
use axis1 or axis2 access webservice by nginx error,the message is:
Unexpected character '1' (code 49) in prolog; expected '<'
but squid is ok!
who can solve this problem