MSLogon can work, require turn OFF simple file sharingconfigure and set MS Logon I or II required only at VNC server.
a) following the doc...
http://www.uvnc.com/features/authentication.html
b) no if the UltraVNC setup was followed and exactly.
http://www.uvnc.com/install/installation.html
c) MS Logon I = Require MS Logon
http://www.uvnc.com/features/authentica ... l#mslogon1
d) MS Logon II = New MS Logon
http://www.uvnc.com/features/authentica ... l#mslogon2
Should set and required only at vnc server.
Important:
do not set vnc server as New MS Logon II on XP Home, won't work at all.
windows XP
Open an Explorer window>Tools>Folder Options>View>The bottom check box