Thanks again! below is the code

#!/usr/bin/perl
use warnings;
use strict;
use LWP::UserAgent;
use HTTP::Cookies;
use HTTP::Request::Common qw(POST);

my $upload_url = 'https://mysite.com/import.do';
my $login_url = 'https://mysite.com/login.do ';

my $https_user = 'ABC';
my $https_pass = 'ABC';
my $file = 'File_2007_10_15_14_21_02.csv';


&postHTTPS();

sub postHTTPS
{
        my $ua = new LWP::UserAgent(keep_alive=>1);
        $ua->proxy(https => 'http://ourproxyserver');
        my $request  = new HTTP::Request ("GET" => $login_url );
        $request->authorization_basic($https_user, $https_pass);
        #$ua->protocols_allowed( [ 'https'] );
        $ua->cookie_jar(HTTP::Cookies->new(file =>".cookies.txt",autos
+ave => 1));
        
      # $request->proxy_authorization_basic($https_user, $https_pass);
     
  #setup request
  print "before posting\n";
  
        my $req=POST ($upload_url,Content_Type => 'multipart/form-data
+',
                        Content_Type => [
                         submit => 1,
                        Content =>  [ $file ]
                    ]);
  print "after posting\n";       


     my $response = $ua->request($req);
     if ($response->is_error())
            {
                    printf " %s\n", $response->status_line;
                    print "https request error!\n";
            } else {
                    my $content = $response->content();
                    #print "$content\n";                    
                }

        print "";
         if ( $response->is_success ) {
                   print $response->as_string;
         }else {
               print $response->status_line;
         }
}
[download]

As you might know I cannot give my exact site name due to some reasons. I think when i call the upload page it goes to the login page whre we have to provide the username and password (not in the form but in the IE authentication box) when i execute the above code I dont get any error! Have I missed anything in the code?