Integration to mailchimp is not working for me in membership 2 pro

I had been getting an error message on the settings screen under MailChimp. So the support person went to my GoDaddy account and added some sort of files.
The error message went away so we assumed it would work. However, I tested registration today and I still was not added to the MailChimp list. I've had this program running for years so I know the problem is with the latest version of the plugin.