Did you try using a search engine to find out what this means?

This error still suggests to me that you have some networking issue. 401 means that you are not authorised (This could be due to a firewall or proxy server setting that needs to be catered for, or a network security setting) to access the resource in question.

Can you reach the URLs I provided via a normal web browser? If so I have already pointed you towards the relevant tutorial explaining how to manually install a .ppd file.

Perhaps you need to re visit the ppm documentation I have liked to, or better still contact your systems/network administrator.

Martin