Crystal Report Exception

Question

How to get rid off this Exception?

 

 

An exception of type 'CrystalDecisions.CrystalReports.Engine.LogOnException' occurred in CrystalDecisions.ReportAppServer.DataSetConversion.dll but was not handled in user code

Database logon failed.

 

Plz help. Its urgent. (Getting this Exception in Line no: 3)

 

case "XLSD":

{

crs.ReportDocument.ExportToDisk(CrystalDecisions.Shared.ExportFormatType.ExcelRecord, Server.MapPath("/Files/") + Profile.CRExportFile + ".xls");

crs.ReportDocument.Close();

crs.ReportDocument.Dispose();

crs.Dispose();

Response.Redirect("/files/" + Profile.CRExportFile + ".xls");

break;

}