Problems with greylistd and Ajenti-V?

Hello,

on my Debian Wheezy with Ajenti-V I greylistd installed as follows:

root@host:~# apt-get install greylistd
root@host:~# greylistd-setup-exim4 add -netmask=24

Adding greylistd support to Exim 4 configuration files
/etc/exim4/exim4.conf.template          : OK
/etc/exim4/exim4.conf.template          : OK
...conf.d/acl/30_exim4-config_check_rcpt: OK
...conf.d/acl/40_exim4-config_check_data: OK
[ ok ] Reloading exim4 configuration files: exim4.

The installation went so easily, but after Exim4 has now sent and received a few emails, I get the following statistics:

root@host:~# greylist stats
Statistics since Thu Oct  9 07:39:37 2014 (1 day and 12 hours ago)
------------------------------------------------------------------
0 items, matching 0 requests, are currently whitelisted
0 items, matching 0 requests, are currently blacklisted
0 items, matching 0 requests, are currently greylisted
Statistics since Thu Oct  9 07:39:37 2014 (1 day and 12 hours ago)

Accordingly seems greylistd not work. In addition, there are the following error message.

root@host:~# greylist list
error: Cannot read from '/var/lib/greylistd/triplets': No such file or directory

Is there possibly a problem with Ajenti-V (Exim4) and greylistd.

greeting
Jochen