Using Mountain Lion and Office 2011 – I can’t get calendar to display entries, new or old. Both are fully up to date

Hello there,
I've recently upgraded to a macbook retina complete with Mountain Lion and I've successfully installed Office 2011 (which I had before on my old macbook).  I've got notes uploaded from the earlier version, I've got email working fine, Word and Excel seem OK, but I can't get anything to appear in calendar, neither historic stuff nor new entries that I add.  I'm able to activate the new event button but when I save and close, nothing appears.  I'm sure it'll be something dead obvious and simple, but I just can't work it out...........:(