After installing Groupwise 5.5.4 on a Windows 98 machine I receive the following error when attempting to log on using the desktop icon. GroupWise has caused an invalid page fault in module Negotiat.dll . . Yet, if I drill down to the Groupwise executable contained within the program I can connect to my remote mail server. Once my mailbox is open I can read my mail but if I try to access the address book it generates the same error as above. Where do I begin to look?