i know this is not a new question..but i try follow the solution working out from other post...but there are nothing to print out on my text area...if i directly print a sentence on my text file..it's work..why?

#!/usr/local/bin/perl
use Tk;
use File::Tail;

#Main Window
my $mw = new MainWindow;
$mw-> title ("Packet Analyzer Tool");

my $frm_1 = $mw -> Frame() -> pack();
my $frm_2 = $mw -> Frame() -> pack();
my $frm_3 = $mw -> Frame() -> pack();
my $frm_4 = $frm_3 -> Frame(-relief => 'groove', -borderwidth =>2) -> 
+pack(-side => "left");
my $frm_5 = $frm_3 -> Frame() -> pack(-side => "right",-after => $frm_
+4);

my $but1 = $frm_1 -> Button(-text => "Start",
        -command =>\&push_start)
        -> pack(-side => "left", -anchor => 'nw', -ipadx => 30, -ipady
+ => 35);

my $but2 = $frm_1 -> Button(-text => "Stop",
        -command =>\&push_stop)
        -> pack(-side => "left",-after =>$but1, -expand => 1,-ipadx =>
+ 30, -ipady => 35);

my $but3 = $frm_1 -> Button(-text => "Pause",
            -command =>\&push_pause)
        -> pack(-side => "left",-after => $but2 ,-ipadx => 30, -ipady 
+=> 35);
#21
my $but4 = $frm_1 -> Button(-text => "Exit",
            -command =>\&push_exit)
        -> pack(-side => "left", -after => $but3 ,-ipadx => 30, -ipady
+ => 35);

my $filter = $frm_2 ->Entry(-width => 65) -> pack(-side =>"left",-anch
+or => 's');
my $but5 = $frm_2 -> Button(-text => "Search", -command =>\&push_searc
+h)
    ->pack(-side => "left", -after => $filter, -ipadx => 10);

my $txt1 = $frm_4 -> Text(-width => 60, -height =>20) 
        -> pack(-side =>"left",-anchor => 's');
my $srl = $frm_4 -> Scrollbar(-orient=>'v', -command =>[yview => $txt]
+);
$txt1 -> configure(-yscrollcommand =>['set',$srl]);
 

$txt1 -> grid(-row=>1, -column=>1);
$srl -> grid(-row=>1, -column=>2,-sticky=>"ns");

my $txt2 = $frm_5 -> Text(-width => 15, -height =>20)
        -> pack(-side=>"right", -anchor => 'e');

MainLoop;
#73
#Executed START BUTTON
sub push_start
{
                open my $fh,'<','/home/terrance/Desktop/perl/record.tx
+t' || die $!;
                my @contents = <$fh>;
                foreach my $line (@contetns)
                {
                         $txt1 ->insert("end", $line);                
+     
                }


#$txt1 -> insert ('end', "hello due\n");

}
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