Thank you very much for the information! If you could edit your node to put the command-line output inside <code> tags, that would help a lot with readability. I don't think you included the output of the echo %PATH% and echo %PERL5LIB% commands?

The next step would be to try and show us the steps you're taking, for example what cpan commands you're using on the command line that aren't working and exactly what the output is. One-liners like the one I showed here are pretty useful diagnostic tools.