The following code works well for me behind a proxy with NTLM authentication. 
my $ua = LWP::UserAgent->new;
$ua->env_proxy;

my $response = $ua->get($URL);

if ($response->is_success) {
    print $response->decoded_content;
}

[download]

In reply to Re: Lwp and NTLM authentication by bcarroll
in thread Lwp and NTLM authentication by miniwinz

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