#3 Error at line 9

[johndoe32102002]

OS: Debian
Error while running either:

sudo perl run
or
sudo perl hulagirl.pl

Error details:
/hulagirl$ sudo perl run
Can't locate Tk.pm in @INC (@INC contains: ./lib /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl .) at ./hulagirl.pl line 9.
BEGIN failed--compilation aborted at ./hulagirl.pl line 9.
Can't locate Tk.pm in @INC (@INC contains: ./lib /etc/perl /usr/local/lib/perl/5.8.8 /usr/local/share/perl/5.8.8 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.8 /usr/share/perl/5.8 /usr/local/lib/site_perl .) at ./hulagirl.pl line 9.
BEGIN failed--compilation aborted at ./hulagirl.pl line 9.