I have got a problem with my Outlook 2007 calendar. I have an IMAP account and all my appointments on my PC have simply vanished but they are still showing on my iPhone. I can see them on my PC if I change my current view to 'All Appointments' but they aren't showing on the 'Day/Week/Month' view. If I log into my iCloud calendar they are all there but they won't show on my PC. Have I done something I shouldn't have and how can I get them back?