Fail to use paradigm4 repository


I followed “Runing iquery from Any Computer” documentation

But I was stuck processing step 2.
I entered my account information below USERNAME:PASSWORD section and processed update package
deb enterprise/15.12/ubuntu14.04/
sudo apt-get update

but HttpError401 occur and fail to receive file from repository.
E: Some index files failed to download. They have been ignored, or old ones used instead.

What can I do?