Create .htaccess file on index.php.
RewriteEngine On
RewriteBase /sitename
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
php_flag display_errors on
Enable rewrite_module on apache server.
Enable include_module on apache server.
Enable cgi_module on apache server.
Enable short open tag on php server.
Configure config.php become.
$config['index_page'] = "...
