Authorization problem using xmlrpclib to access Zope

[David Peng]

I am writing a command-line python program to create a File Object in Zope
using its xmlrpclib as client. I got an error message saying:

   You are not authorized to access this resource.
   No Authorization header found.'

The way I did this is:
    s = xmlrpclib.Server(myURL, xmlrpclib, BasicAuthTransport(userid, passwd))
    s.test.manage_addProduct.OFSP.manage_addFile("testfile")

BTW, I am using  Amos's BasicAuthTransport.

Could someone please give me some help?

Thanks in advance.