[Zope] Newbie Qu: user login in private folders

[Matthew]

Hi all,

Having a really hard time here.  I'm trying to create separate folders 
for each of my clients, and I don't want anyone else but them to access 
anything in the folder.

I've read many ways of settings the permissions to make the folder 
private, and I think I have the hang of that.

The problem: I create a user in their private folder, but they can't log 
in.  The only allowable log-ins seem to come from the top CMF folder.

I even tried creating a test without any restrictions just to log in- 
but still only users from the top CMF folder can log in.

Can someone please let me know what I'm doing wrong, or point me in the 
right direction.  I know everyones busy, but I really can't figure out 
what's happening.

Many thanks.

Matthew.