error help me look

visit:l27.0.0.1/test.jsp is ok,but:

visit:l27.0.0.1 skip to>>http://127.0.0.1/mem/index.jhtml
hint:404 Not Found

visit:http://172.16.0.103:8080 skip to>>http://127.0.0.1:8080/mem/login.jhtml is visit normal ,ok

see index.jsp
[root@gavin mem]# more index.jsp
<%@ include file="/com/taglibs.jsp"%>

<c:redirect url="/mem/index.jhtml"/>

more nginx.conf

user www www;
worker_processes 2;
error_log /usr/local/nginx/logs/nginx_error.log info;
pid /usr/local/nginx/nginx.pid;

google_perftools_profiles /tmp/tcmalloc;

worker_rlimit_nofile 65535;

events
{
use epoll;
worker_connections 65535;
}

http
{
include mime.types;
default_type application/octet-stream;
#charset gb2312;



log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log logs/access.log main;


server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 300m;
sendfile on;
tcp_nopush on;
keepalive_timeout 60;
tcp_nodelay on;
server_tokens off;

client_body_buffer_size 512k;
proxy_connect_timeout 5;
proxy_send_timeout 60;
proxy_read_timeout 5;
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
# fastcgi_connect_timeout 300;
fastcgi_intercept_errors on;
# fastcgi_send_timeout 300;
# fastcgi_read_timeout 300;
# fastcgi_buffer_size 64k;
# fastcgi_buffers 4 64k;
# fastcgi_busy_buffers_size 128k;
# fastcgi_temp_file_write_size 128k;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;

#limit_zone crawler $binary_remote_addr 10m;

server
{
listen 80;
server_name web_1.fohow.com;
index index.jsp index.html index.do;
root /usr/local/tomcat/webapps/www;
#limit_conn crawler 20;
if (-d $request_filename)
{
rewrite ^/(.*)([^/])$ http://$host/$1$2/ last;
}

location ~ \.(jsp|jspx|do)?$ {
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_pass http://127.0.0.1:8080;
proxy_redirect default;
}

location ~ .*\.(htm|html|gif|jpg|jpeg|png|bmp|swf|ioc|rar|zip|txt|flv|mid|doc|ppt|pdf|xls|mp3|wma)$
{
expires 30d;
}
location ~ .*\.(js|css)?$
{
expires 1h;
}
}
}

please tell me Wrong and how to do ?