I've activated the plugin and followed all the instructions for MailChimp, yet I can't seem to get it to work. The checkbox shows up on my comment form, but when I post a test comment and tick the box, nothing happens. I never get signed up, no confirmation email, nothing.
I tried using both URLs I could find for the form action (the one that shows up on the source code for the embedded signup form on my site, and the one that shows up in the URL box when I click the link to subscribe form in my MailChimp dashboard). Neither works.
What am I doing wrong?