Go4Expert - CGI Error - CGI application misbehaved by not returning a complete set of HTTP Header

Guys, I am getting following error,

CGI Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers.

Here is a program,

Code:

use CGI qw/:all/;

use MIME::Base64;



$web = new CGI;

$FirstScreenIn = 1;

require "d:/inetpub/APP/cgi/cookie/GetCookie.pl";

&GetCookie;



if ($UsernameIn eq "") {

   print $web->header();

   print "REDIREDCT*****".$UsernameIn;



} else {

...

}

GetCookie.pl

Code:

sub GetCookie {

#!perl -w

use CGI qw/:standard/;

use CGI::Cookie;

use MIME::Base64;

%Cookies = fetch CGI::Cookie;

...

use SOAP::Lite;

I use activePerl and is hosted by IIS 5.0

Can anyone give my direction to look for the issue? TIA