dani_cv_74,

Chart::StackedBars is included in Chart::Base which can be added via ppm like so:

C:\> ppm install http://landfill.bugzilla.org/ppm/Chart.ppd

GD from:

C:\> ppm install http://landfill.bugzilla.org/ppm/GD.ppd

I don't have access to ppm at the moment but it sounds like you either have network connectivity issues, or you are not using it to search properly. Read holli's node A guide to installing modules for Win32 for (almost) all of your Win32 module needs :)
If you have not checked it out already have a look at PPM::Repositories.

Hope this helps.

Martin