TOPIC: ...NOT_SUBSCRIBED_TO... Invalid MailChimp List ID

This happens on top of the Jomsocial Community page whether a user is logged in or not.
If I disable the Jomsocial CMC plugin, the error message reads:
COM_CMC_YOU_WERE_NOT_SUBSCRIBED_TO_NEWSLETTER:Invalid MailChimp List ID
If the plugin is enabled, the message is translated, but of course it means the same...
An error has occurred and you couldn't be subscribed to our newsletter:Invalid MailChimp List ID:

No List ID is listed. The plugin, as well as the Joomla Module and the User plug have the list selected, and the fields selected.
The module displays and appears to work fine.
This is an upgrade form 1.4 and we also tried the latest 1.5.1 alpha and still have the issue.

Hey Kevin,
can you make screenshots of your plugin config?

Yes, thank you.

I've attached them (didn't know if I needed to insert them too so I did )







Thanks again.

Hey Kevin,
Can you provide me with access to your site. Please send it to: This email address is being protected from spambots. You need JavaScript enabled to view it.
Regards,
Daniel