[Zope] Why my zope ask me login twice ?

[Terry]

Dear friends on this list,

This question probably had been anwsered. But I just search the archie.
I add a Ldaplogin Adapter on a folder under my root folder. Then I try 
to use the ldap to check the user login.
When I login the the subfolder. The Zope ask me the password the check 
with ldap server then ask me again the password again to match the 
acl_users under
root folder.  I have no idea.

Thanks a lot,

Have a nice day

Terry