Can't reply to Forum messages

Hi All,

I can't post replies to any of the AAVSO discussion forum topics. Although I can start a new Forum Topic (e.g. this one).

I am logged onto the AAVSO website and can view all forum content ok. When I click on the reply button my browser (IE8 running under WIN XP) is directed to the reply form but the Comment box is visible for only a second or so before it disappears. The Subject box is ok.

Does anyone else have this problem, or am I doing something wrong? Cheers,

Mark