cron.hourly doesn't run

[Hall Stevenson <hallstevenson@mindspring.com>]

I've got one file in my /etc/cron.hourly dir.

-rwxr-xr-x    1 root     root          291 May  8 17:57 update-dyndns

My /etc/crontab file looks like this:

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# m h dom mon dow user  command
25 6    * * *   root    test -e /usr/sbin/anacron || run-parts --report
/etc/cron.daily
47 6    * * 7   root    test -e /usr/sbin/anacron || run-parts --report
/etc/cron.weekly
52 6    1 * *   root    test -e /usr/sbin/anacron || run-parts --report
/etc/cron.monthly
#
60 * * * * root         test -e /usr/sbin/anacron || run-parts --report
/etc/cron.hourly

Problem is, that update-dyndns script doesn't appear to execute hourly.
I've got it creating a log file and as of right now, the log reports
this:

ipcheck.py: Thu May  8 23:39:21 2003
ipcheck.py: logging to /etc/ipcheck/ipcheck.log
ipcheck.py: opt_directory set to /etc/ipcheck/

and more... that's the relevant part...

Why would this not get run like it's supposed to ??

Regards
Hall