Mandatory profiles for restricted users

Up until recently we have successfully been using mandatory profiles under windows 2000 server and Window 2000 professional. As we have installed newer machines with XP pro on them, the local mandatory profile takes up to 2 minutes to load from the first time the user logs in and any subsequent time the user has logged in (meaning a copy of his local mandatory profile is already in documents and settings). What do we need to change in order for the user to login normally. These users are restricted users of the PC, and the mandatory profile is in C:\Documents and Settings\ – called Shared.