Unauthorized. API Key Invalid.

When I try to use my API from mailchimp, I get the error below. I’ve generated new ones and they don’t work. I’ve also talked to my host provider and the PHP cURL is up-to-date.

Unauthorized. API Key Invalid. Your API key may be invalid, or you’ve attempted to access the wrong datacenter. Request: GET https://us8.api.mailchimp.com/3.0/?fields=account_id Response: 401 Unauthorized – {“type”:”http://developer.mailchimp.com/documentation/mailchimp/guides/error-glossary/”,”title”:”API Key Invalid”,”status”:401,”detail”:”Your API key may be invalid, or you’ve attempted to access the wrong datacenter.”,”instance”:”c7ef8d6d-d36b-4ca9-8cfe-e5ddac6d5fe9″}