I had a look on the VM website about the superhub lights and it only lists three lights on the side. The top connection one can be green or blue and for DOCSIS 3 it should be blue. If yours is green check the connection status page as it may be wrong. Alternately the imp inside that waggles his lamp about so you can see it through the case has picked the wrong one up.
This link may or may not work...
http://www.google.co.uk/url?sa=t&sou...9hHuCwbLrcg0hA