LOAD REPORT FAILED

When I am trying to load a report, i get error message "LoadReportFailed"..Can anyone help me find the root cause of this error and resolve this issue

Stacktrace :

at CrystalDecisions.ReportAppServer.ReportClientDocumentWrapper.EnsureDocumentIsOpened()

at CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename, OpenReportMethod openMethod, Int16 parentJob)

at CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename)

at ChangewareViewer.UI.Report.RMReportDocument.InitReportDocument()

at ChangewareViewer.UI.Report.RMReportDocument.LoadReportDocument()

at ChangewareViewer.UI.Report.RMReportDocument.LoadReport(Double dblReportId)