Schedule export using cron?

Hi
I want to schedule the export of a table using cron job.
create the .sh file as below
export ORACLE_BASE=/opt/oracle
export ORACLE_HOME=/opt/oracle/product/9.2.6/db_1
export ORACLE_SID=orcl
/opt/oracle/product/9.2.6/db_1/bin/exp system/manager file=/home/oracle/test.dmp log=/home/oracle/test.log tables=table_name
$crontab -l
43 16 * * * /home/oracle/export.sh > /home/oracle/export.log
but when this crontab job runs export is not performed and i can't file the export dump file and logile.
test.log file is getting created with nothing in it.
Can any one let me know what is wrong with the shell script.
Regards,

Hi ,
Can you please change the permission of your export.sh file
$chmod 775 export.sh.
Study the below link for more details.
http://www.elated.com/articles/understanding-permissions/
Best regards,
Rafi.
http://rafioracledba.blogspot.com/

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How can I do it?
Please tell me complete Solution,cause I have tried it so many times But...
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http://www.quest-pipelines.com/newsletter/cron.htm
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crontab -ei made the next line:
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Message was edited by:
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