It sounds like you are trying to use the ActiveState Perl Package Manager on an older version of perl. I get the same: "failed 401 Authorzation Required" from my AS Perl 5.10.1.
Older ActiveState perl requires a paid subscription.
Can you try with the latest version?
Are you posting in the right place? Check out Where do I post X? to know for sure.
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Want more info? How to link or
or How to display code and escape characters
are good places to start.