Cron job not starting

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http://serverfault.com – the following cron job works fine: */1 * * * * /path/to/script but this does not start: 0 23 * * * /path/to/script this confuses me a lot, I do not get any error messages when setting up the cron job, but the second cron job just will not start??? it is the same script that is being run so it can not be any errors in the script. thanks in advance (HowTos)