title: Can't locate object method "default_header" via package "LWP::UserAgent"
body: <p>I am trying to test Twitter Module of Perl for some work and facing the mentioned subject line while running it. The system where I am running it is AIX and Perl version is 5.8.8</p>
  
  <p>Code.</p>
  
  <pre><code>#!/usr/bin/perl -w
  use Net::Twitter::Lite;
  use Scalar::Util 'blessed';
  use strict;
  require LWP::UserAgent;
  my $ua = LWP::UserAgent-&gt;new;
  $ua-&gt;timeout(10);
  $ua-&gt;env_proxy;
  
  
  my $consumer_key = "ck";
  my $consumer_secret = "cs";
  my $access_key = "ak";
  my $access_secret = "as";
  
  
  my $nt = Net::Twitter::Lite-&gt;new(
      consumer_key        =&gt; $consumer_key,
      consumer_secret     =&gt; $consumer_secret,
      access_token        =&gt; $access_key,
      access_token_secret =&gt; $access_secret,
  );
  
  $nt-&gt;update("Status Update from Perl!");
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Can't locate object method "default_header" via package "LWP::UserAgent"
     at /ts/vb/perl5/lib/perl5/Net/Twitter/Lite.pm line 104.
  </code></pre>