Have added the extension to the site http://www.asme.org.uk using the module.

Everything is okay except that after submitting the form the AJAX ticker appears and stays there, not replaced with any "thank you" messages. I've used Chrome's inspector and there are no errors in there that I can see (ie JQuery conflicts), in addition when I tested myself I did get the confirmation email from Mailchimp so it looks like the request gets through to MC, just that the "thanks" message isn't displaying.

Any ideas what it could be?