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addNewList() getting 404 error

I think the addNewList(string accountname, string listname) is to add a new contact list to an account. Please correct me if i am wrong.
But I couldn't find any place where we give the second parameter listname in the body of the function.

more over that I am getting 404 error when i run this programme.
please help.
Not applicable

Please note that the above

Please note that the above example adds only one contact using Activities resource, but the Activities resource is only recommended for adding more than 25 contacts.  Please refer the documentation on the Activities resource to see how you can add more contacts to the example code above.

To add one contact, please use the Contacts resource.

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