If you are getting Warning Messages like this one:
"Warning: file_get_contents() [function.file-get-contents]: URL file-access is disabled in the server configuration..."
This means that your server configuration is blocking external file access.
Solution:
allow_url_fopen should be ON in PHP configuration (php.ini). You may not have access to edit this file and it could also be that your hosting company has restricted changing the allow_url_fopen value. In this case, you should refer to them and ask them to set the value of allow_url_fopen to ON.