Buckaduck.... ....i dont know if its worth mentioning it, because his code doesnt have the same error, however it does have the same symptom as mine.... It CAN work like this:

use Tk;
use Tk::NoteBook;
my $mw = MainWindow->new(-width => 40, -height => 50);

$mw->title("Ventana Principal");
$mw->Label(-text => "Uso de pack")->pack;

$FrameFon = $mw->Frame(-relief => 'raised')->pack(-side => 'bottom', f
+ill => 'x', -expand => 1);

$Libreta = $FrameFon->NoteBook();
$Libreta->pack(-side => 'top');

$Libreta->add("Pagina1", -label =>"Configuracion");
$Libreta->add("Pagina2", -label => "Logs");

MainLoop;
[download]

...but mine didnt work because i was writing Notebook instead of NoteBook.... :">