[Zope] exUserFolder with smb - zope 2.5 hangs up

Hello, i'm using ... exuserfolder 0.10.7 in a subfolder zope 2.5 smb authentication null property null membership Authentication works as much as i can see fine (i checked the smb frames with eathereal). Login works only, if there is already the same username in root acl_user. But it only works one time. If i try to visit a second site zope hangs up. How does zope know, what roles this smb_user has ? Tries exuserfolder to use the roles from root_acl_user ? How can i define Users without having them in root_acl_users ? Thanks for some postings, Harry