The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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://nieuwsbrief.defriesland.nl/ct/m12/k1/HVTwGohLwR8LmrFL8PH4aVphmSntYmGwK43huoTIhWhB_dtFD6nMBwIfEyYLfJXQMD-9TTXZpKGWG11wAo5ZdQ/yKjaZIEypdX3V28