[Zope] DirectoryStorage - no logon

Hi all, I've been having some problems with DirectoryStorage. I've installed an instance of zope using the -u and -g switches (-u toto -g zope). I've installed DirectoryStorage and configured the custom_zodb file. I've dropped root privileges to start zope. I've followed all the procedure. At this stage all seemed to be working fine. Zope recognised DirectoryStorage and started properly. But when I try to logon (zope/manage) nothing happens. The request is sent, but then it just waits indefinitely. Did anyone have this problem? Any explanation as to why it reacts this way? Thanks in advance for any suggestions. Fnk.