The Ad Trackz Gold plugin requires that the php.ini allow_url_fopen directive setting is set to On: allow_url_fopen = On. If the allow_url_fopen directive setting is set to Off, change it to On in your custom php.ini file. If you do not have a custom php.ini file or have not created a custom php.ini file for your website contact your Web host and ask them to assist you with this issue.