error in crystal reports

An error has occurred.
DotNetNuke.Services.Exceptions.ModuleLoadException: Invalid report file path. ---> CrystalDecisions.CrystalReports.Engine.LoadSaveReportException: Invalid report file path. at CrystalDecisions.CrystalReports.Engine.EngineExceptionUtils.DoThrowException(String message, EngineExceptionErrorID id) at CrystalDecisions.CrystalReports.Engine.ExceptionThrower.ThrowEngineException(String messageID, EngineExceptionErrorID id) at CrystalDecisions.CrystalReports.Engine.ReportDocument.Load(String filename, OpenReportMethod openMethod, Int16 parentJob) at CrystalDecisions.CrystalReports.Engine.ReportDocument.EnsureLoadReport() at CrystalDecisions.CrystalReports.Engine.ReportDocument.get_Database() at Aricie.DNN.Modules.CrystalReportViewer.CRDisplayReport.ApplyLoginInfo(ReportDocument _oRpt, TypeConnection typeConnection, String dsnFilePath) at Aricie.DNN.Modules.CrystalReportViewer.ReportViewer.LoadCrystalReport() at Aricie.DNN.Modules.CrystalReportViewer.ReportViewer.Page_Init(Object sender, EventArgs e) --- End of inner exception stack trace ---