Viewing Schedule+ from Outlook 2001

[Oz]

We have a very mixed environment with PCs running Windows
XP and Outlook 2002 and Macs with Mac OS 9.1 with Outlook
8.2.2 (Using Schedule+).

I've installed Outlook 2001 onto my Mac, but can't view
the Schedule+ calendars of Mac users. However I can from
Oultook 2002 on an windows XP PC.

I get the following error message "The folders could not
be opened. You need additional permission to perform this
operation. See your administrator."