tk Problem

[Magnia]

hei bin gerade am proggen und will tk nutzen

! /usr/bin/perl -w

use strict;
use Tk;

MainWindow->new();
MainLoop();

nur leider sagt er

Can't locate Tk.pm in @INC (@INC contains: /System/Library/Perl/5.8.6/darwin-thread-multi-2level /System/Library/Perl/5.8.6 /Library/Perl/5.8.6/darwin-thread-multi-2level /Library/Perl/5.8.6 /Library/Perl /Network/Library/Perl/5.8.6/darwin-thread-multi-2level /Network/Library/Perl/5.8.6 /Network/Library/Perl /System/Library/Perl/Extras/5.8.6/darwin-thread-multi-2level /System/Library/Perl/Extras/5.8.6 /Library/Perl/5.8.1 .) at ./test line 4.
BEGIN failed--compilation aborted at ./test line 4.

was issn da kaputt und wie bekomm ich es zum laufen ?