Private appointments shown in teamcal.htm (teamcalendar)

A department of our company is using teamcal.htm to consolidate all
personal calendars to one teamcalendar. This all is working fine.

One problem occurs: Several colleagues use their personal calendar
also for private appointments by marking them as "Private". When these
colleagues does a refresh in the teammcalendar their private
appointments appear in the teamcalendar with all details.

When an other colleague does a refresh, the appointments of the first
colleagues are shown as private (as mented) but the private
appointments of the second colleague are shown with all details.

Specs:

Exchange 5.5
Windows XP (client)
Outlook 2000
Teamcal.htm v2.2

Anny suggestions to solve this problem?

Thanx in forward

Gertjan