authentication in zope server & Python

[Raghul]

Hi
   I am trying to execute a sample python script using zope server.The
problem is I need to execute a python script in the linux machine. When
I call that function through the zope server,It shows me the error
regarding authentication that is 'access denied for myfunction'

   In my function just I am copying a file from one location to another
location in the same machine.

Thanx in advance