<a href="http://www.bunspace.com/view_bunny?bunid=2831"><img src="http://www.bunspace.com/static/bunpics/2831/badge100.jpg"/></a>
I was using safari and it wouldn't let me make a comment either. I changed to firefox and magically I could. I think it's might just be your browser.
The same thing happened to me. After your free 30days runs out you have to pay a monthy fee to be able to approve comments. :?I think everything else still works but no one else can see the comments on your page.