How to retrieve SQL statement in the CR 2008

I'm using Crystal Reports 2008 in MS Visual Studio 2008, how can i retrieve SQL statement from *.rpt file, i have tried this code, but it doesn't work:
ReportDocument rdReport = new ReportDocument();
rdReport.Load("Reports/EmployeeTest.rpt", OpenReportMethod.OpenReportByTempCopy);
CrystalDecisions.ReportAppServer.Controllers.RowsetController rsController;
CrystalDecisions.ReportAppServer.ClientDoc.ISCDReportClientDocument rdClient = rdReport.ReportClientDocument; // on this line it throws an exception "The ReportClientDocument property can only be accessed when the report is opened using a Report Application Server."
CrystalDecisions.ReportAppServer.DataDefModel.ISCRGroupPath rdGroupPath = new CrystalDecisions.ReportAppServer.DataDefModel.GroupPath();
string temp;
string sql;
rsController = rdClient.RowsetController;
sql = rsController.GetSQLStatement(rdGroupPath, out temp);
maybe i'm doing something wrong ?
thanks

Hello Ludek,
when I try to get the report from the session I got an error like this (I am using State Server Session mode i.e out proc in my application)
ReportClientDocument     'reportDocument.ReportClientDocument' threw an exception of type 'System.InvalidOperationException'     CrystalDecisions.ReportAppServer.ClientDoc.ISCDReportClientDocument {System.InvalidOperationException}
+base     {"The ReportClientDocument property can only be accessed when the report is opened using a Report Application Server."}     System.SystemException {System.InvalidOperationException}
StackTrace     "   at CrystalDecisions.CrystalReports.Engine.ReportDocument.get_ReportClientDocument()"     string
so is it the problem of not opened with RAS. Does installation of RAS solves the problem, If so Is it a free-ware or needs to be purchased.
Ashok

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