php-ccurl试图检索页面，但无法工作

我正在尝试从该页面检索表单。我设置了cookie，还发送了表单数据，但我得到的只是无效页面。

$ckfile = tempnam ("/tmp", "CURLCOOKIE");

$ch = curl_init ("http://services.www.gov.qa/TV/process/TV/TV_TrafficViolation?lang=en&notloggedin=true");
curl_setopt ($ch, CURLOPT_COOKIEJAR, $ckfile); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);
curl_exec ($ch);

$ch = curl_init ("http://services.www.gov.qa/TV/continue/TV/TV_TrafficViolation/2/CPN");
curl_setopt ($ch, CURLOPT_COOKIEFILE, $ckfile); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
$data = array(
    'sopEngineTabRef' => '1376927282615',
    'act' => 'byCarPlateNo',
    'txiVehicleNumber' => '',
    'mnuVehicleType' => 'PRV',
    'vehicleNumberNType' => '12332/PRV',
    'searchCriteria' => '1',
    'searchCriteria' => 'qatariUser1',
    'vehicleNumberAndType' => '12332/PRV',
);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
echo $output = curl_exec($ch);
$info = curl_getinfo($ch);
curl_close($ch);