CrystalReport "访问被拒绝" 错误的处理

今天用.NET开发CrystalReport时碰到一个“访问被拒绝”的错误，页面代码如下：

ReportClientDocument RCD = new ReportClientDocumentClass();
RCD.ReportAppServer = "GRD-DAVI-XIONG";
object sFilePath = @"E:\AAA.rpt";
RCD.Open(ref sFilePath,0);

CrystalReportViewer1.ReportSource = RCD;
问了一下报表平台开发组的兄弟，原来错误是sFilePath前还要加一个前缀rassdk://，如下

object sFilePath = @"rassdk://E:\\AAA.rpt";