You can try a 'force install' via CPAN.pm (it's documented), or do 'make install' manually in your ~/.cpan directory. You can also try the last suggestion in my previous message and ignore the fact that a few of the tests failed. I have never used Tree::Simple::*, so I can't advise whether the tests which fail are significant. Your next port of call if you have trouble with it once you have it installed is the module authors/maintainers.
in reply to Re^2: Trouble installing Tree::Simple::Visitor::FindByPath
in thread Trouble installing Tree::Simple::Visitor::FindByPath