Daniel
Thank you for your help, I have CMC working on a trial site
www.abbeyfield.mightec.com/
I am using a regular module position on the right and that is working just fine, I will add a review to JED.
I have also got it working via an extension called Perfect Popup Box, this uses the Debug position and is show on the right and when you click on the tab the registration form opens.
I am looking to use a popup if I can. the only problem here is that after filling in the detail on the form, it doesn't show your acknowledgement message but it does go through the MailChimp process.
Thank you once again for your helpful reply.
Regards
Mike