I'm the Administrator for the site and I'm one of the organisers. I don't know why you can't get on to our site. The link is working for me
Have you tried both that link and the new link underneath my signature as well?
I'm keen to help you get on to our site so, if there is still a problem, please would you send me a PM with your email address?
Thanks
Tigger.
PS: Is it coming up as a bad link for other users as well?