Calendar issues with Outlook 2k3

Apparently since I upgraded my desktop pc to outlook 2k3, most of the users in the office have been unable to view my calendar, but get a message “unable to display the folder” and a grey screen. They used to be able to open it, and can access everyone elses calendar. The weird thing is that one person can open it, but they are using service release 1 of office 2000 – everyone else is not service packed (because of the annoying “do you really want to send this message” when automatic macros kick in). In the meantime, I’m enjoying the privacy which leads me to wonder if outlook didn’t have the private button functionality would it break privacy laws where employee’s can expect privacy? It would be interesting to see if outlook 97 is still able to read private events in the calendar (which it used to be able to do)