Tk with thread and stram data

[faustf]

hi Monks , i try to find a solution of my scenario. i have a stream source of string data , i capture with perl and i want show it in list widget , in Tk , in windows 10 and strawberry (last version ) perl 5 i have created this code but i dont know why , the script work correctly only one time and after not upgrade a string inside of Tk any one can help me ?

use warnings;
use strict;
use threads;
use threads::shared;

my $ret:shared = 0;
my $die:shared = 0;;

my $val = 0;

#create thread before any tk code is called
my $thr = threads->create( \&worker );

use Tk;
use IO::Socket::INET;

my $mw = MainWindow->new();
$mw->protocol('WM_DELETE_WINDOW' => sub { &clean_exit }); 

my $label = $mw->Label(
         -width => 50,
         -textvariable => \$val )->pack();

my $button;
$button = $mw->Button(
      -text => 'Stop thread',
       -command => sub{
        $button->configure(-state=>'disabled');
        $die = 1;
       $thr->join;
      },
     )->pack();

 
my $timer = $mw->repeat(10,sub{
              $val = $ret;
             });

MainLoop;

sub clean_exit{
 $timer->cancel;

my @running_threads = threads->list;
if (scalar(@running_threads) < 1){print "\nFinished\n";exit}
  else{
     $die = 1;
     $thr->join;
     exit;
  }
}

# no Tk code in thread

sub worker {
    # auto-flush on socket
    $| = 1;

# creating a listening socket
my $socket = new IO::Socket::INET (
    LocalHost => '127.0.0.1',
    LocalPort => '23456',
    Proto => 'tcp',
    Listen => 5,
    Reuse => 1
);
die "cannot create socket $!\n" unless $socket;
print "server waiting for client connection on port 23456 \n";

while(1)
{
    # waiting for a new client connection
    my $client_socket = $socket->accept();

    # get information about a newly connected client
    my $client_address = $client_socket->peerhost();
    my $client_port = $client_socket->peerport();
    print "connection from $client_address:$client_port\n";

    # read up to 1024 characters from the connected client
    my $data = "";
    $client_socket->recv($data, 1024);
    print "received data: $data\n";
 
    $ret = $data;

   my  @data_array = split(/;/,$data);
    foreach (@data_array) {
        return "$_\n";
      print "$_\n";
    }

    # write response data to the connected client
    $data = "ok";
    $client_socket->send($data);

    # notify client that response has been sent
    shutdown($client_socket, 1);
}

$socket->close();
}

thanks at all