cURL代理问题

下面给了我一个407错误，有人能看到我为什么或在哪里出错吗?我是一个代理人。我在这上面花了些时间。我用的是正确的凭证。谢谢

function pushMeTo($widgeturl,$text,$signature) {
    $agent = "Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.12) Gecko/2009070611 Firefox/3.0.12";
    if (!function_exists("curl_init")) die("pushMeTo needs CURL module, please install CURL on your php.");
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $widgeturl);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HEADER, 1); 
    curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1); 
    curl_setopt($ch, CURLOPT_PROXYUSERPWD, 'user:pass');
    curl_setopt($ch, CURLOPT_PROXY, "IP");
    curl_setopt($ch, CURLOPT_PROXYPORT, 8080);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($ch, CURLOPT_USERAGENT, $agent);
    $page = curl_exec($ch); //or die("Curl exe failed"); 
    print_r(curl_error($ch));
    print_r($page);
    preg_match("/form action='"(.*?)'"/", $page, $form_action);
    preg_match("/textarea name='"(.*?)'"/", $page, $message_field);
    preg_match("/input type='"text'" name='"(.*?)'"/", $page, $signature_field);
    //print_r($message_field);
    $ch = curl_init();
    $strpost = $message_field[1].'=' . urlencode($text) . '&'.$signature_field[1].'=' . urlencode($signature);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $strpost );
    curl_setopt($ch, CURLOPT_URL, $form_action[1]);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_USERAGENT, $agent);
    $page = curl_exec($ch);
}


?>
<?
$url = "MY URL";
 pushmeTo ($url,"This Is A Test","ServiceDesk");
?>