Fanatically Zen with SugarCRM and Zendesk

We updated our sub-domain name on 1/31; we have also updated our Zendesk configuration in Admin to the new sub-domain name. Cases are being created in Sugar, but our Fanatical Zendesk dashboard displays this error: "We did not receive a response in the 200 range. Code received: 404 Response: { "error": { "title": "No help desk at brainselltechnologies.zendesk.com", "message": "There is no help desk configured at this address. This means that the address is available and that you can claim it at http://www.zendesk.com/signup" } } Note: brainselltechnologies.zendesk.com is the old sub-domain - the new one is configured. Please advise how I can resolve this issue. Thanks!