Problem with "Greylist" (qmail 1.03) -- no error but also no success

[white_rabbit]

Hi.
i followed this howto to install
greylist support for spam:
http://meshier.com/2006/09/18/adding-greylisting-support-to-qmail-on-plesk-8/
The script should run on PLESK 7.5.4 too

no errors and install went great.
but when executing perl /etc/cron.daily/greylist

i get no errors in /tmp/greylist_dbg.txt. The file is created but there are no inserts.

i also created db with user in the plesk control panel and also with phpMyAdmin to give the user full privileges.

so my question is, since if i have no error and no entry in /tmp/greylist_dbg.txt and db, what would be the next step

using plesk 7.5.4 on SuSE 9.3
Thanx for help,
W.R.