The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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/LlYy_qcDkncp71_YIm9X7WKAH5ItWO0_gPRg3uz-J5jIDWVYrANi355jRAGv346X8yu26NWB-g3G6PDoUK0jIw/JPESdpWKCm4pQAB