If you use the all folders view, does the calendar show? If you select the
calendar from that view, does it display?

If not, right click on the calendar and select properties, then Home Page
and try resetting the default.

--
Milly Staples [MVP - Outlook]

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After furious head scratching, Davidi asked:

| One of our users has lost the ability to view her Calendar from "My
| Calendars". She can view her Calendar from the Folder List view so
| the Calendar and appointments do exist, but when she clicks the
| Calendar icon in the bottom left pane, it says unable to view
| calendar. She can view Other Calendars and People Calendars but her
| calendar doesn't appear in My Calendars. Any ideas how to add it
| back? I removed her Outlook profile and created a new one but the
| Calendar view didn't return. I'm running an Office 2007 repair right
| now. Thanks.