Bing translate парсер переводчик

Народ помогите парсит бинг

    $payload = json_encode( array( "id"=> "2093147784", "text"=> "привет") );
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, 'http://www.bing.com/translator/api/Translate/TranslateArray?from=ru&to=zh-CHS');
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,true);
    curl_setopt($curl, CURLOPT_POST, true);
    curl_setopt($curl, CURLOPT_POSTFIELDS, $payload);
    curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type:application/json'));
    curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.2; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0'); 
    $out = curl_exec($curl);
    curl_close($curl);
    print_r($out);

1. post: http://www.bing.com/translator/api/Translate/TranslateArray?from=ru&to=zh-query

2. string parameters: from=ru&to=zh-CHS

3. request payload: [{"id":2093147784,"text":"привет"}]

Получаю ответ: {"message":"Service unavailable. Please try again later."}