Personal Folder Properties, Calendar in Outlook 2007

[Gio300ZX]

I have just started to use Outlook 2007 on a new Vista PC. My personal
calendar does not show up in the To-Do Bar. I found a knowledgebase article
926443 which tells me "right-click the personal folder, click Properties,
click to select the Display reminders and tasks from this folder in the To-Do
Bar check box, and then click OK."

But when I do this, my Personal Folder Properties does NOT have this check
box.

I'm stumped. Why does my Personal Folder not have this check box and how do
I get it back?