Hi klokm. My apologies for not responding. I got your email and replied and I hoped that would have helped, bt it seems it doesn't.
You have now tried three browsers, IE, Firefox and I assume Chrome, and none work. You can submit a new discussion post but cannot reply, not even to your own posts.
It is strange that 2 'new' browsers fail as well. Can you tell me, does Firefox have any security add-ons installed, like NoScript, or any anti-virus toolbar or similar.
Also what security utilities do you use, which anti-virus, and anything else you use?
If you are still unable to reply to this post, send me an email. You will have my email address.