My b2evolution Version: 2.x

Is it possible somehow to sort the comments so that the newest are on top instead of at the bottom?

I have created a guestbook via a "Page"-post and allowed comments on that post but after testing, it appeared that the newest comments are always showing at the bottom instead of at the top.

I'm using skin "Bluer" and you can check out the blog at http://www.photastic.be (the guestbook is under the obvious link "Guestbook" ;))

Thanks in advance!

ps: if it helps, i don't allow comments on my other posts, only on the guestbook...