Comments can't be deleted

Hi folks,

I just set up the phpns and it works really great, except one thing:

If I write a test article and write some test comments, I can delete the article itself, but not the comments. I just have a checkbox for "Select all", if I check it and click "Delete selected items" nothing happens. Also, I want to be able to select a single comment and delete it, but there is no checkbox for only one comment, only the "Select all" checkbox.

Have I done somthing wrong?

Greetings, Martin