I wrote before and was unclear as to exactly what my problem is. Now, I know more. I have a test user (TEST) on NT4 and I know that the password is ok on NT because I logged on as this user once just to check. When trying to access the shares from a "Map Network Drive" window, I am getting rejected by Samba because of PAM authentication, even though I have "obey pam restrictions = no". I am using the exact password that I entered via smbpasswd when I am logged in for this user on Linux. Coming back the other way to NT gives me a password authentication fault. Can anybody point me as to where to look to solve this problem?? This is too weird given that there are so many Samba installations working.