I have installed the perl module WWW:Mechanize in my machine. The machine contains RHEL 4. And when i ran a program like the following one:

use strict;
use WWW::Mechanize;
use HTTP::Cookies;
use HTTP::Request::Common;
use HTTP::Response;
use LWP::Debug qw(+);

#######################
####Variables $username, etc
########################

my $mech = WWW::Mechanize->new();
$mech->cookie_jar(HTTP::Cookies->new());

# post login
$mech->get($url);
$mech->form_name('Form1');
$mech->field('txtUserID' => $username);
$mech->field('txtPassword' => $password);
#$mech->field('btnSubmit' => 'Submit');
my $response=$mech->click('btnSubmit');
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I got the following error when i used the Debug mod for LWP.

LWP::UserAgent::new: ()
LWP::UserAgent::request: ()
LWP::UserAgent::send_request: GET https://www.abc.com/default.aspx
LWP::UserAgent::_need_proxy: Not proxied
LWP::Protocol::http::request: ()
LWP::Protocol::collect: read 739 bytes
LWP::Protocol::collect: read 4096 bytes
LWP::Protocol::collect: read 4096 bytes
LWP::Protocol::collect: read 4096 bytes
LWP::Protocol::collect: read 2281 bytes
HTTP::Cookies::extract_cookies: Set cookie ASP.NET_SessionId => 0rjco5
+45pbrr3gbwmsi5ndjy
LWP::UserAgent::request: Simple response: OK
Can't locate object method "decoded_content" via package "HTTP::Header
+s" at (eval 16) line 1
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But, When i removed the line decoded_content() from the Mechanize.pm module in my system, i got the correct response. Since it is not correct to modify the modules in CPAN for specific use, can you suggest me some ways of how to overcome this error or how i can rectify this?