Comments not working

Hi, I hope you can help,

I’m unable to post comments onto my blog. I can fill in the form and press “Say It!“, but I get a blank page at wp-comments-post.php

To see what was going on I added a “print_r($_POST)” at the top of wp-comments-post.php and it outputs “Array ()“, so nothing’s being passed to the script, but I can’t understand why.

Any help would be much appreciated. You can find the blog here.

Thanks in advance,

Jim