D:\comp58_M\PPM-2.1.7>ppm install Math::FFT
Installing package 'Math-FFT'...
Element 'IMPLEMENTATION' cannot contain a child element 'PROVIDE' at D:/perl58_M/site/5.8.8/lib/PPM.pm line 1658.
Can't locate object method "rvalidate" via package "PPM::XML::PPD::PROVIDE" at D:/perl58_M/site/5.8.8/lib/PPM/XML/ValidatingElement.pm line 38.