Dear Mr. Masato,
I will send you one email per week until you either reply and acknowledge the problem (or tell me what I'm doing wrong), fix your oracle module so that it works under 'cron', or both.
You can't hide forever.
Sincerely,
Me
UPDATE: Mr. Masato replied the next day. Do you think he read my journal entry? His reply - "Make sure you set your environment variables". GAH! Must control...fist...of death.