[Plugin: BuddyPress Template Pack] Missing Reply/Comment functionality activity stream

Could do with some help, please?

http://www.trinitystmatts.org.uk/community/wall/

The Activity stream found on this page is missing the text area required to make a comment/reply. In fact,when I do press reply/comment the page simply refreshes itself. (the issue is the same on a blog entry).

However, if I disable template pack CSS, this works okay, but then formatting is totally incorrect.

It’s like the functionality to comment/reply is not loading.

Any help gratefully received!

http://ww.wp.xz.cn/extend/plugins/bp-template-pack/