ConnCache not been used in LWP::UserAgent

All,

I'm trying to put together a short script to test a Keep-Alive  
connection:
##### CODE BEGINS #####
#!env perl -w
use strict;

use LWP::UserAgent;
use LWP::ConnCache;

my $browser = LWP::UserAgent->new(conn_cache => 1);
$browser->conn_cache(LWP::ConnCache->new());
my @lines = ("mind is a terrible thing to waste\n") x 10;
my $start = time;
my $url = 'http://yourhost/yourpath';
my $count = 0;

foreach (@lines) {
    my $response = $browser->post( $url,
                                   [  'pos' => $count,
                                    'block' => $_,
                                   ],
                                   'Content_Type' => 'form-data',
    );

    $count += length $_;
}


print time() - $start;
print " secs\n";

##### CODE ENDS #####

I noticed that when the request is made the HTTP headers don't  
include "Connection: Keep-Alive".  It does include "Connection: TE".
Reading the UserAgent.pm source code I noticed that the connection  
cache is stored in $self->{conn_cache} but that value is never used  
in the module.  May be is used by reference in other places by  
passing $self.
The point is that the client is opening connections for every request.

/amn