Calendar updating Outlook 2000

Using Outlook 2000 SP1, IMO, Net Folders add-in installed etc...
We are using Internet Mail, I checked to make sure everyone had the mail configuration set to Internet Mail Only. Initially some were set to the Corporate/Workgroup and was not allowing some calendars to be viewed, issue fixed there, but now...the only 2 calendars I can not seem to get pulled in on my pc.

I have received the invitation, setup the calendar to load where I want, but have not seen anything pull in for either of their calendars.

Have check setting on both the laptop (running Win 2000 w/Outlook 2000 SP1) and desktop (running Win '98se w/Outlook 2000 SP1, and are set identical as much as I can see. Other machines in the office are mixed: running Win '98se, XP, and running Outlook 2000 or Outlook 2000 SP1 and are pulling into my outlook fine.

Can't seem to resolve the issue. Have uninstalled Outlook, reinstalled ..same issue...