Where are my daily/weekly/monthly reports?

[ALGORYTHM]

i've been running a plesk 8 vps for a while now and for some reason i'm not gettin the security/root/weekly etc emails that i should.

cron shows

/usr/local/psa/admin/bin/php /usr/local/psa/admin/plib/report/autoreport.php --auto daily >/dev/null 2>&1
/usr/local/psa/admin/bin/php /usr/local/psa/admin/plib/report/autoreport.php --auto monthly >/dev/null 2>&1
/usr/local/psa/admin/bin/php /usr/local/psa/admin/plib/report/autoreport.php --auto weekly >/dev/null 2>&1

and i've set up email correctly.

any ideas please?