Control::VLV error

Hi,
my ldap server is OpenLDAP-2.4.18 with sssvlv overlay configured.
Running my perl script, which is in principle based on
Net::LDAP::Control::VLV, I get following errors:

slapd:
> get_ctrls: oid="2.16.840.1.113730.3.4.9" (critical)
<= get_ctrls: n=2 rc=2 err="vlv control value is absent"
send_ldap_result: conn=0 op=2 p=3

perl:
Errorcode: 2
Fehlertext: Unrecognized version number or incorrect PDU structure
Can't call method "context" on an undefined value at
/usr/lib/perl5/site_perl/5.10.0/Net/LDAP/Control/VLV.pm line 106,
<DATA> line 891.

It seems that the content of my vlv object, except for criticallity,
is not passed to the server.

,----[ vlv sss object ]
| $vlv  = Net::LDAP::Control::VLV->new(
|         before  => 0, 
|         after   => 19,
|         content => 0,
|         offset  => 1,
| 	critical => 'TRUE'
|       );
| my $sort = Net::LDAP::Control::Sort->new( order => 'cn:2.5.13.3',
| 					   critical => 'TRUE');
`----

-Dieter

-- 
Dieter Klünter | Systemberatung
http://dkluenter.de
GPG Key ID:8EF7B6C6
53°37'09,95"N
10°08'02,42"E