Cannot see directory listings in plugin.

The site is not allowing me to display any of the listings that were created. Please check the following link:

I have reuploaded the .htaccess file and am hosting this on Rackspace Cloud Sites. Here is what the .htaccess file contains:

# PHP Site Settings for Rackspace Cloud Sites
php_value max_execution_time 3600
php_value upload_max_filesize 100M
php_value post_max_size 220M
php_value memory_limit 256M
# End PHP Site Settings

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress