L at your profile, Turmag, I'm wondering whether you have an old browser (IE6) and this is the reason why you can't post answers on threads. You may want to look at the Ed's video on this or upgrade to a later browser. Hope this helps
Sorry, my first word should have said 'Looking'- Answerbank keeps stopping on me today. That's one problem with upgrading to IE9- as I type I keep getting messages about cross site scripting and Answerbank not responding due to long running scripts.
Maybe go for Firefox, Turmag