[xwiki-users] Users can't change password / view profile

Hello everyone, my problem is, that the users I created cannot change their password. If they click on the "Profile" or "Preference" Link they get: "Error: You are not allowed to view this document or perform this action." The Users themselfs do not have any rights assigned to them. However, they all belong to a group called SUG. The groupd has the following rights: View: true Comment: true Edit: false Delete: false Admin: false Register: false Program: false I don't think that I have changed anything this space/page -rights. What am I missing? Any help is appreciated. Cheers, Chris