GW 8 HP2

I setup webex conferences at work a lot and would like to let my users
know about putting the ical files in their calendars. However when I try
to import them into GroupWise they always go out of whack, time
displacements etc.

However I import the very same ics file into Thunderbird\Lightning and
the appointment drops into place in the correct place and time.

Does anyone have an idea where I can start to look for the problem

Many Thanks in Advance