I am trying to use this plugin to let users login in the manager. I tried the debugging as explained in the readme.md and that works perfect, I see an array of all of my Active Directory users of the given OU. But when I configure it in the manager and use the [[!ModLDAPDebug? &username=`bosse1981` &password=`xxx`]] I get a page with empty values. The logging only says:

[2017-03-20 12:52:02] (INFO @ /core/components/modldap/model/modldap/modldapdriver.class.php : 406) [ModLDAP:Driver] modLDAPDriver initialized...

What am I doing wrong? I use an AD account in the snippet call (see `bosse1981` above) is that correct? Or is it supposed to be the account that enumerates the ldap objects?
In the system settings I have a section `modldap` but also a section `modldapuser` with no settings in it. I tried to create settings ldap_bind_username and ldap_bind_password but that does not work. Bind format etc. is the same as in the debug file.