Outlook client displays logon box

Hi,

I one user out of 50 that has to access Outlook/Exchange 2000 from an XP Pro PC Sp1 that gets a “login box” displayed when trying to access Outlook 2002/Exchange/email. My network is Win2k SP3 using AD. Outlook settings are set to “authenicate via netwwork “. I found an article stating how to turn the logon box on by setting athenication to “none” in avanced properties in Outlook. I checked these settings on the problem PC and they are set for authenication. I ghosted this PC from another PC and the other PC does not have any problems. I have uninstalled Outlook and reinstalled with the same problem. Does anyone know what I need to look for in the registry to delete so I can correct this problem?

thanks,
Rob