WON'T ACTIVATE
What environment?.
First make sure you have cleared your Browser cache.
You are asking peers here. The following is a solution I have posted many times.
A bunch of things lead to problems loging into HBO GO and many other Online Channel sites.
The general way it works is for you to go to HBO GO site. Ask to look at something and it switches in a FRAME pointing to VERIZON and you signin. Verizon stores some information in flash and returns. That information must still be there so that HBO accepts you as authorized.