This is not really a Perl issue. You should ask your system administrator on how to best do that in your environment.

A quick fix would likely be to execute:

export PATH=/tools/sol/perl/bin;$PATH
[download]

in your shell session or to add a line like that to your .profile. Or you could actually read what I gave you as a solution in my first reply instead of blindly changing things around and praying for the best.