ERROR 404 - Not Found! On SubDomain Wordpress Nginx

Hello l am getting a ERROR 404 - Not Found! On a SubDomain using Wordpress and Nginx.
the main site same issues before but it was fix by adding the code below. but how can l add it to the subdomain or how to fix the issue

nginx Directives:
if ($http_user_agent ~ WordPress) { return 444; }
limit_req_zone $binary_remote_addr zone=default:10m rate=50r/m;
location / {
try_files $uri $uri/ /index.php?$args;
fastcgi_read_timeout 600;
proxy_read_timeout 300;
limit_req zone=default burst=10 nodelay;
}

# Add trailing slash to */wp-admin requests.
rewrite /wp-admin$ $scheme://$host$uri/ permanent;

location ~* \.(jpg|jpeg|png|gif|css|js|ico)$ {
expires max;
log_not_found off;
}

client_max_body_size 100M;

location /roundcube {
root /var/lib/;
index index.php index.html index.htm;
location ~ (.+\.php)$ {
try_files $uri =404;
include /etc/nginx/fastcgi_params;
# To access SquirrelMail, the default user (like www-data on Debian/Ubuntu) must be used
#fastcgi_pass 127.0.0.1:9000;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_intercept_errors on;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_buffer_size 128k;
fastcgi_buffers 256 4k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
}
location ~* /.svn/ {
deny all;
}
location ~* /README|INSTALL|LICENSE|SQL|bin|CHANGELOG$ {
deny all;
}
}
location /webmail {
rewrite ^ /roundcube last;
}