We just upgraded our Servers from XP to 2003. My Macintosh OS 10.2.8 sees the network but fails to login. I have installed MSUAM 10.0.2 and on the Mac get an error code -5000 or -5023 depending on case setting. That is an "access denied" error code. The system administrator and I have tried a number of things to no avail-- any ideas?