Windows XP Home loses drive map - defaults to deleted user..

Windows XP Home SP2 with all Microsoft Updates. Peer to peer network,
one PC used as dedicated "server." Server was replaced, new user
profiles created for server (all current users) and existing profiles
modified to match server's. "unable to reconnnect network drives"
message comes up - when it is opened or the icon clicked, the folders
are there and the map is restored. restart machine - same problem -
plus the default user name is the old one using the crl-alt-del method
of startup. How do I correct?