CPAN not working

uh, CPAN stopped working on my MacBook yesterday...
no apparent reason for that, only an error like:

Can't locate Mac/Files.pm in @INC (...)

after checking libraries and the file /Library/Perl/5.8.8/AppendToPath
I've decided to make a fresh installation of Mac::Files...

I've downloaded from:
http://search.cpan.org/~cnandor/Mac-Carbon-0.77/Files/Files.pm

and made a forced installation...

CPAN is back at work, now!