I had the same problem months ago.
I think you're getting trouble with the "location" of the ppm packages.
Try to force this location:

c:\>ppm install --location=http://www.activestate.com/ppmpackages/5.6p
+lus tk
[download]

or install the last activeperl distribution
Regards

Hopes

$_=$,=q,\,@4O,,s,^$,$\,,s,s,^,b9,s,
$_^=q,$\^-]!,,print
[download]