Outlook 2000 Problem

Have a network with 6 machines all 98’s. Running Outlook 2000 and sharing calendars. One machine continues to apparently corrupt the NetFolder. I can run an NFCLEAN ant it will fix the problem but it soon returns. This is the only machine running DOS simultaneously and therefore I suspect this may be the cause. Any ideas? If I create a new profile (which I assume I should) can I import the calendar to keep from loosing all of the appoinmets….how?
thanks