Hello,
HTTP_UNAUTHORIZED simply means that you have not entered the username/password correctly.
Make sure that you understand the difference between using rpcuser/rpcpassword and rpcauth.
You should use either user/pass or auth.
(The values foo and bar I gave above are examples, you should replace them with the credentials you are planning to use.)
Hope this helps. Please let me know if you have any more questions.
with regards