无法从ssrs获取数据到php网页

Question

在尝试从ssrs版本（2008 R2）获取数据到php网页时，我收到以下错误：

 SSRSReportException Object
 [errorCode] => rsAccessDenied
 [errorDescription] => The permissions granted to user 'PC\Phpdemouser' 
 are insufficient for performing this operation.
 [soapFault] => SoapFault Object
 [message:protected] => System.Web.Services.Protocols.SoapException: 
 The permissions granted to user 'PC\Phpdemouser' are insufficient for 
 performing this operation

什么可能是错的，所以它给出了这个错误。