Don't worry, this only means that the DNS is configured correctly (the domain is pointing to our servers) and there's only one more step needed to activate the site.
Log into your site's editor and go to Settings> Domain> Existing Domain. Add your domain name and click connect. The site is immediately up under your domain name.
If you haven't upgraded your site as needed to connect a domain, you will be asked to do so (see more http://support.imcreator.com/entries/24044760-Connecting-Your-Website-to-a-Domain)
If you see a message 'this domain is already taken' click on cancel and then on the blue PUBLISH button in the upper-right corner of the editor.