调用Web Service时出错

Question

我正在尝试使用PHP / SOAP调用Web服务，这是代码，但我不知道我做错了什么？

$client = new SoapClient(null, array('exceptions' => true, 'cache_wsdl' => WSDL_CACHE_NONE, 'location' => `https://services.acxiom.com/risk-findpeople0003/1.0?WSDL`, 'uri' => `https://services.acxiom.com/risk-findpeople0003/1.0?WSDL`, 'login' => 'LOGIN_VAL', 'password' => 'PASS_VAL',));

以下是我得到的错误：

SoapFault: Endpoint
{`http://findpeople0003.riskapi.acxiom.com/risk-findpeople0003/1.0`} RiskFindPeople0003BeanPort
does not contain operation meta data for:
{`https://services.acxiom.com/risk-findpeople0003/1.0?WSDL`}getFindPeople
in `SoapClient->__call()`  

你知道为什么会这样吗？ 谢谢！