The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
http://nzmea-sendy.zvo.nz/l/zQETt2cNb8dmrcOkKbZUiQ/jlYj9pRsSfwzRSpnQGUbJg/Wq2Wo1raGHD3F59DMy6Huw