Database Logon Failed (ASP.NET/Crystal Reports XI R 2)

''' <summary>
    ''' This method converts a crystal report into a PDF file
    ''' </summary>
    Private Sub ExportToStream()
        Dim oStream As New IO.MemoryStream
        Dim rptDocument As ReportDocument = New ReportDocument()
        Dim subreport As ReportDocument
        Dim parmName As String = "@MrId"
        Dim parmValue As Integer = SessionData.EssInfo.MrId
        Dim exportOpts As ExportOptions = New ExportOptions()
        Dim pdfOpts As PdfRtfWordFormatOptions = ExportOptions.CreatePdfRtfWordFormatOptions()
        Dim logon As New TableLogOnInfo
        Dim tbl As Table
        Dim serverName1 As String = PCON.APP.db_Server
        Dim dbName As String = PCON.APP.dbName
        Dim userID As String = PCON.APP.UserName
        Dim password As String = PCON.APP.Pass
 
        Try
            exportOpts.ExportFormatType = ExportFormatType.PortableDocFormat
            exportOpts.ExportFormatOptions = pdfOpts
            rptDocument.FileName = PCON.APP.FileName(SessionData.EssInfo.EssCategoryId)
            rptDocument.SetParameterValue(parmName, parmValue)
 
            ' Set Database Logon to main report
            For Each tbl In rptDocument.Database.Tables
                logon = tbl.LogOnInfo
                SetLogonInfo(logon)
                tbl.ApplyLogOnInfo(logon)
            Next tbl
 
            'Provide database credentials to subreports
            For Each subreport In rptDocument.Subreports
                For Each tbl In subreport.Database.Tables
                    logon = tbl.LogOnInfo
                    SetLogonInfo(logon)
                    tbl.ApplyLogOnInfo(logon)
                Next 'Tbl
            Next 'Subreport
 
            rptDocument.SetDatabaseLogon(userID, password, serverName1, dbName)
            oStream = CType(rptDocument.ExportToStream(ExportFormatType.PortableDocFormat), IO.MemoryStream)
            Response.ContentType = "application/pdf"
            rptDocument.Close()
            rptDocument.Dispose()
            Response.BinaryWrite(oStream.ToArray())
 
            HttpContext.Current.ApplicationInstance.CompleteRequest()
 
        Catch ex As Exception
            Response.Write(ex)
        Finally
            oStream.Flush()
        End Try
    End Sub
 
    Private Sub SetLogonInfo(ByRef logon As TableLogOnInfo)
        logon.ConnectionInfo.ServerName = PCON.APP.db_Server
        logon.ConnectionInfo.DatabaseName = PCON.APP.dbName
        logon.ConnectionInfo.UserID = PCON.APP.UserName
        logon.ConnectionInfo.Password = PCON.APP.Pass
    End Sub