captcha image not getting scraped from App1-Comp1-Site#2.

Test code below works. If this works then why doesn't the script's way work? It uses the same exact pattern.

<?php

$str = file_get_contents('http://www.wordorigins.org/index.php/forums/member/register/');

$pattern = '(<img[a-z\s]+src=")((http://)?(www.)?([a-z0-9-]+)([\.a-z]+/)(images/captchas/)([a-z0-9\.]+)(\.jpg))';
$pattern = '#'.$pattern.'#i';

$result = preg_match($pattern, $str, $match);

var_dump($result);
var_dump($match);

?>