Are you trying to run this as root? a regular user or a user with elevated permissions? If you are running as root. I would strongly advise against doing that. Instead have a user with the appropriate permission levels to do the task and nothing more. Running cron jobs as root could be problematic at best (a security issue at worst).
Comment on Re: perl script in nohup running from crontab
Thanks for you concern, even i do agree with you doing these kinds of things will open many security issues.
but this machine is inside a secure domain , no connection form out side world.