Meitantei Connor

I can't find the massage box

It's always at the bottom of the page in a topic (right under the text "Reply to this topic"). If you want to create a new topic, click "Start New Topic". You can read the link I gave you above, it will teach you how to do post and about other features.

Oh, I just noticed that you're still in Validating group, maybe this is the reason why you can't see the message box. Try activating your account by clicking the link that was sent to your email after your registration.