What the heck does "parsing allow zone transfer query failed" mean?

Hey there,
trying to bind (sic :-)) LDAP to bind9, I followed the small tutorial at
[1].

I included the dlz.schema, added the necessary LDAP data and configured
the LDAP driver in /etc/bind/named.conf.

However, trying to start bind9 with the new configuration, I get the
following errors:

17-Aug-2009 16:12:31.682 Loading 'ldap zone' using driver ldap
17-Aug-2009 16:12:31.683 Loading SDLZ driver.
17-Aug-2009 16:12:31.684 LDAP driver running multithreaded
17-Aug-2009 16:12:31.685 parsing allow zone transfer query failed
17-Aug-2009 16:12:31.686 SDLZ driver failed to load.
17-Aug-2009 16:12:31.687 DLZ driver failed to load.
17-Aug-2009 16:12:31.688 load_configuration: failure
17-Aug-2009 16:12:31.689 loading configuration: failure
17-Aug-2009 16:12:31.689 exiting (due to fatal error)

Unfortunately, google isn't very helpful upon searching for an answer.
And the error message isn't very clear either.

What does "parsing allow zone transfer query failed" mean? Where did the
config go wrong? I can attach my config files, if needed.

Using bind9 9.5.1 on Ubuntu 9.04 server. And yesss, I even recompiled
with DLZ enabled.

Cheers,
Robert

[1]
http://blog.leo34.net/2008/06/dns-server-bind-mit-zonen-in-ldap-via-bind-dlz/
(beware: it's in german)


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