I am trying to logon to my Amazon Seller Central account and upload a Order file. I cannot seem to get the following to work. Any help would be greatly appreciated!

use strict;
use HTTP::Headers;
use HTTP::Cookies;
use HTTP::Request::Common;
use LWP::UserAgent;
my $file='testfile.txt';
uploadFileToAmazon($file);
sub uploadFileToAmazon{
    my $file=shift;
    my $ua  = LWP::UserAgent->new;
    $ua->cookie_jar(HTTP::Cookies->new(autosave => 1 ));
    $ua->max_redirect(20);
    push @{ $ua->requests_redirectable }, 'POST';
    #First Sign into Amazon SellerCentral account with cookies enabled
+ so they get passed on
    my $url='https://sellercentral.amazon.com/gp/sign-in/sign-in.html'
+;
    my %form=(
        protocol    => "https",
        action        => "sign-in",
        email        => $Username,
        optin        => 1,
        ouid        => "01",
        password    => $Password
        );
    my $res=$ua->post( $url,\%form);

    #then post the file and pass in the info
    $url='https://sellercentral.amazon.com/gp/upload-download-utils/up
+load.html';
    my %form=(
        uploadType    => "ShippingConfirmation",
        uploadFileName =>[$file]
        );
    my $res=$ua->post( $url,'Content-Type'    => "multipart/form-data"
+,Content=>\%form);
     #Display the contents of the response
     return $res->content;
    }
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