That is because the return url on lines 318 and 321 doesn't have the www. in front of the url. You will probably want to add the www. in front of the url on those two lines. Then you will want to update your .htaccess file to force the user to always view the www. version to prevent it from causing issues without it. See: http://stackoverflow.com/questions/4916222/htaccess-how-to-force-www-in-a-generic-way