in reply to
PPM: Cant find any packages that provides MinGW ?!
No problem here in downloading from ActiveState's 5.16 repo:
C:\sisyphusion>ppm install Math::FFT
Downloading ActiveState Package Repository packlist...done
Updating ActiveState Package Repository database...done
Generating HTML for Math-FFT-1.28...done
Updating files in site area...done
6 files installed
C:\sisyphusion>ppm repo list
id pkgs name
1 14693 ActiveState Package Repository
(1 enabled repository)
This would further indicate that your problem is a configuration/connection issue (as has already been suggested).
Run ppm help
for documentation regarding commands you can run that might help you work out what has gone wrong.