How do I add a new sheet?

com.sun.star.lang.IndexOutOfBoundsException:

Private Sub SaveAsOds()
        If SaveFileDialog1.ShowDialog() = System.Windows.Forms.DialogResult.OK Then

            Dim objServManager As Object
            Dim objDesktop As Object
            Dim objDocument As Object
            Dim objSheet1 As Object
            Dim objSheet2 As Object
            Dim objFrame As Object
            Dim objDispatch As Object
            Dim objArguments As Object() = {}
            Dim objArgument1(0) As Object
            Dim objArgument2(3) As Object
            Dim objArgument3(1) As Object

            objServManager = CreateObject("com.sun.star.ServiceManager")
            objDesktop = objServManager.createInstance("com.sun.star.frame.Desktop")
            objDocument = objDesktop.loadComponentFromURL("private:factory/scalc", "_blank", 0, objArguments)

            objDispatch = objServManager.createInstance("com.sun.star.frame.DispatchHelper")
            objFrame = objDocument.getCurrentController.getFrame

            'Set properties of calc sheets
            objArgument3(0) = SetProperties("Name", "sheetx")
            objArgument3(1) = SetProperties("Index", 3)
            Call objDispatch.executeDispatch(objFrame, ".uno:Insert", "", 0, objArgument3)

            objArgument3(0) = SetProperties("Name", "sheetx1")
            objArgument3(1) = SetProperties("Index", 3)
            Call objDispatch.executeDispatch(objFrame, ".uno:Insert", "", 0, objArgument3)

            objArgument3(0) = SetProperties("Name", "sheetx2")
            objArgument3(1) = SetProperties("Index", 3)
            Call objDispatch.executeDispatch(objFrame, ".uno:Insert", "", 0, objArgument3)

            objSheet1 = objDocument.Sheets.getByIndex(0)

            'Set the name of sheet1
            objSheet1.Name = "Amortization"
            Dim dtAmort As System.Data.DataTable = grdvwAmortization.DataSource

            Dim iColumnIndex As Integer = 0
            Dim iRowIndex As Integer = 0

            ''Fill the sheet1 by reading the grdvwAmortization data
            For i = 0 To grdvwAmortization.RowCount - 2
                For j = 0 To grdvwAmortization.ColumnCount - 1
                    objSheet1.getCellbyPosition(j, i + 1).setString(grdvwAmortization(j, i).Value.ToString())
                Next
            Next

            objSheet2 = objDocument.Sheets.getByIndex(1) ' <== Error
            objSheet2.Name = "SOA"

            'Account Details
            objSheet2.getCellbyPosition(4, 14) = Date.Now.ToString("MM/dd/yyyy")
            objSheet2.getCellbyPosition(6, 4) = lblLastName.Text + ", " + lblFirstName.Text
            objSheet2.getCellbyPosition(7, 4) = getLoanType(lblLoanType.Text)
            objSheet2.getCellbyPosition(12, 4).NumberFormat = "@"
            objSheet2.getCellbyPosition(12, 4) = txtbxPNNum.Text

            'Copy datagridview to excel
            Dim Row As Integer = 13

            For i = 0 To grdvwSOA.RowCount - 2
                For j = 0 To grdvwSOA.ColumnCount - 1
                    objSheet2.getCellbyPosition(Row, j + 1).setString(grdvwSOA(j, i).Value.ToString())
                Next
                Row = Row + 1
            Next

            Dim strFilename As String = String.Empty
            Dim binFileOpen As Boolean = False

            strFilename = SaveFileDialog1.FileName + "_" + Replace(Date.Today.ToShortDateString, "/", "_") + ".ods"

        Try

            objArgument3(0) = SetProperties("URL", "file:///" & Replace(strFilename, "\", "/"))

            'If RadioButton1.Checked Then
            '    objArgument3(1) = SetProperties("FilterName", "StarCalc 4.2")
            'Else
            '    objArgument3(1) = SetProperties("FilterName", "MS Excel 97")
            'End If

            Call objDispatch.executeDispatch(objFrame, ".uno:SaveAs", "", 0, objArgument3)
            objDocument.Close(True)

            MsgBox("Data's are exported to Excel Succesfully in '" & strFilename & "'", MsgBoxStyle.Information)

        Catch ex As Exception
            binFileOpen = False
            MsgBox(ex.Message)
        End Try
        End If
    End Sub