The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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/QqAO8922i4R1XFJoX08GENuQ/2892JPp558JRteYbwAdSkIIw/cs5vdlU5q763fOgpkqwwQN9g