cron.php won't be executed

[jonny23]

cron.php won't be executed by the crontab

this is the syslog:
Aug 31 20:45:01 srv114 /USR/SBIN/CRON[7093]: (root) CMD (/usr/bin/php -q /var/kunden/webs/rpt/ptbw/cron.php > /dev/null &)
Aug 31 20:46:01 srv114 /USR/SBIN/CRON[7096]: (root) CMD (/usr/bin/php -q /var/kunden/webs/rpt/ptbw/cron.php > /dev/null &)
Aug 31 20:47:01 srv114 /USR/SBIN/CRON[7099]: (root) CMD (/usr/bin/php -q /var/kunden/webs/rpt/ptbw/cron.php > /dev/null &)

when i execute the cron.php via browser, it work's nice!

[jonny23]

i think that zend could be the problem.

[admin]

try

cd /var/kunden/webs/rpt/ptbw/;/usr/bin/php -q cron.php

[jonny23]

debian etch - dedicated server
ZendOptimizer-3.2.2-linux-glibc21-i386

syslog:
Aug 31 22:44:01 srv114 /USR/SBIN/CRON[7532]: (root) CMD (cd /var/kunden/webs/rpt/ptbw/;/usr/bin/php -q cron.php > /dev/null &

nothin changed.

[jonny23]

cron.php - chmod 777

[jonny23]

i fixed it greek-style
because in browser works, i call it that way.

*/5 * * * * wget http://www.domain.ext/cron.php

less stress i guess