We bought Office 2008 from a physical store with the promise of the free upgrade to 2011 (November 2010). We installed 2008 using the activation keys supplied, and then later upgraded to 2011 via download. No new keys were given with the upgrade (presumably the old keys were valid since the upgrade worked fine). We got a new mac and tried to install the software from a Office 2011 back up dvd that we order at upgrade time. The 2008 activation keys do not work. Any ideas on what to do. (I have opened an issue with Microsoft).