If you google this one then its quite likely you will have seen a million and one different ways to get rid of this.
This happens if you point your new DNS to your server when you havent setup the corresponding DNS record on the WHM server (e.g. if you have added an A record for a subdomain but have not yet put the subdomain details into cPanel so it knows where to point).
Once you do this its quite simple to remove this message, simply clear your browser cache – then get designing to your hearts content 
