Receiving missing parameter error

I have converted a VS2003 vb.net application to VS2010.  The previous VS2003 version used CR XI.  I downloaded the latest version of CR for the vs2010 version and everything seemed to go smoothly.  The code converted beautifully, but when trying to run the report, I am now receiving a missing parameter error.  I am pulling the data into CR via a stored procedure.  My code is below:

                    Case 2 'Job Site Totals with all Questions
                        cmdSetUp.Parameters("@ManagerID").Value = Session("SessionManagerID")
                        cmdSetUp.ExecuteNonQuery()
                        cmdSetUp.Dispose()

                        'Set up dataset for crystal report Main
                        cmdCrystalReport_Main_TotalWithAllQuestions.Parameters("@ManagerID").Value = Session("SessionManagerID")
                        Qadapter.SelectCommand = cmdCrystalReport_Main_TotalWithAllQuestions
                        Dim ds As New DataSet
                        Qadapter.Fill(ds)
                        cmdCrystalReport_Main_TotalWithAllQuestions.Dispose()

                        'Create an instance of the strongly-typed report object for Main
                        crReportDocument = New JobSiteTotals
                        crReportDocument.SetDataSource(ds)
                        CrystalReportViewer1.ReportSource = crReportDocument

                        Qadapter.Dispose()
                        ds.Dispose()  

                       CrystalReportViewer1.HasExportButton = False
                       Me.CrystalReportViewer1.ReportSource = crReportDocument
                       crReportDocument.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, False, "")
                       DataBind()

I am receiving the missing parameter value on this line:   crReportDocument.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, False, "")

Any suggestions on what is going on and how I can correct this?