Login issue on www.hdfgroup.com


I am having difficulty logging in on www.hdfgroup.org. Whenever I try i get this error:
There was a problem with your log in: Unknown or invalid login ticket. [error code: access_denied]

I think my e-mail was verified because I entered the code sent by e-mail.

The odd thing is that I was able to enter to log onto https://forum.hdfgroup.org

Thanks for your help.

Good day