У меня выдаёт ошибку

C:\Documents and Settings\Admin>perl cxsstester.pl
Can't locate Tk.pm in @INC (@INC contains: C:/Perl/site/lib C:/Perl/lib .) at cx
sstester.pl line 20.
BEGIN failed--compilation aborted at cxsstester.pl line 20.

C:\Documents and Settings\Admin>