John, Thanks for your help, I was able to find a .pst file for one of the normal user. Though myself I was using the microsoft outlook as administrator and the .pst for the administrator has disappeared, could it be that administrator setting were over written when I upgraded to XP from win2000, in that case one should not use administrator as username. I notice I cann't have username administrator in xp even though I am the administrator, or am I barking up the wrong tree?
Thanks again