php – Mandrill提供无效的应用程序密钥错误

$args = array(
    'key' => '73357ad2-e59e-4669---------','message' => array(
        "html" => "<p>rntHi Adam,</p>rn<p>rntThanks for <a href="http://mandrill.com">registering</a>.</p>rn<p>etc etc</p>","text" => null,"from_email" => "xxx@xxx.com","from_name" => "SIVOnline","subject" => "Your recent registration","to" => array(array("email" => "xxx@xxx.com")),"track_opens" => true,"track_clicks" => true,"auto_text" => true
    )   
);
// Open a curl session for making the call

$curl = curl_init('https://mandrillapp.com/api/1.0/messages/send.json' );
// Tell curl to use HTTP POST
curl_setopt($curl,CURLOPT_POST,true);

curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false);
// Tell curl not to return headers,but do return the response
curl_setopt($curl,CURLOPT_HEADER,false);
curl_setopt($curl,CURLOPT_RETURNTRANSFER,CURLOPT_HTTPHEADER,array('Content-Type: application/json'));
// Set the POST arguments to pass on
curl_setopt($curl,CURLOPT_POSTFIELDS,json_encode($args));

// Make the REST call,returning the result
$response = curl_exec($curl);


 // Close the connection
    curl_close( $curl );

并且在重新生成密钥后它给我无效的api密钥仍然我得到相同的错误.