Originally I thought something was wrong with my wordpress install or environment since it is behind a proxy and firewall. I kept getting the error "Could not open socket" when clicking "Post Comment". I was trying some other plugins for anti-spam in the comments and those seemed to have problems too. I changed the theme from the default wordpress 3 theme and they started working. I started to go through the various themes and in some it works and in some it doesn't. Doesn't work in the default WP theme, does work in Arras.