my code is

#!/usr/bin/perl -w

# Noida                 sendmail.pl
# --------------------------------------------------------------------
+--
#
# File:       sendmail.pl
#
# Autor:      Ansuman Manna / 14.12.2012
#
# Purpose:    Email attachments in Perl
#
# Location:   /var/lib/asterisk/agi-bin
#
# Certified:  Perl 5.6.1, MIME-Lite-2.117 on Cygwin / Windows 2000
# --------------------------------------------------------------------
+--

use MIME::Lite;
use Net::SMTP;

### Adjust sender, recipient and your SMTP mailhost
my $from_address = 'ansuman@cloudinfotech.co.in';
my $to_address = 'keshav@cloudinfotech.co.in';
my $mail_host = 'mail.cloudinfotech.co.in';

### Adjust subject and body message
my $subject = 'A message with attachment ...';
my $message_body = "Here's the attachment file(s) you wanted";

### Adjust the filenames
my $my_file_wav = '/usr/src/Propmpts';
my $your_file_wav = 'Koi.mp3';
#my $my_file_zip = 'my_file.zip';
#my $your_file_zip = 'your_file.zip';

### Create the multipart container
$msg = MIME::Lite->new (
  From => $from_address,
  To => $to_address,
  Subject => $subject,
  Type =>'multipart/mixed'
) or die "Error creating multipart container: $!\n";

### Add the text message part
$msg->attach (
  Type => 'TEXT',
  Data => $message_body
) or die "Error adding the text message part: $!\n";

### Add the GIF file
$msg->attach (
   Type => 'sound/wav',
   Path => $my_file_wav,
   Filename => $your_file_wav,
   Disposition => 'attachment'
) or die "Error adding $file_gif: $!\n";

### Add the ZIP file
#$msg->attach (
 #  Type => 'application/zip',
 #  Path => $my_file_zip,
 #  Filename => $your_file_zip,
  # Disposition => 'attachment'
#) or die "Error adding $file_zip: $!\n";

### Send the Message
MIME::Lite->send('smtp', $mail_host, Timeout=>60);
$msg->send;
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i am attaching the mp3 file of 12 kb..but it only sending 72b of the file..kindly help me out....