Perl Modules and different perl directories

[csgonan]

My new solaris server has perl 5.8.4 installe by default. I upgraded to 5.8.8. When I try and install certain perl modules using MCPAN, many times I get "up to date". But when I run the script from the perl site to check perl modules, I do not see many of the modules that are indicated as "up to date". This is the script. I searched around and see a perl5 directory in /usr that points to a 5.8.4 install of perl but some of those site-perl directories are empty. How can I see what perl directory MCPAN is using for the install, what this script uses for the install, and what path perl scripts will use for the install?

Thanks

use ExtUtils::Installed;
my $instmod = ExtUtils::Installed->new();
foreach my $module ($instmod->modules()){
my $version = $instmod->version($module) || "???";
print "$module -- $version\n";
}