i am trying to create a form that lets me add new entries into a database when i click a button. "reference to a non-shared member requires an object reference" is the error that occurs at karateDataSet.Tables("Payments") on line 17 and 22 in the code. any help would be appreciated, thanks.

Public Class AddNewPayments

    Private Sub btnShow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnShow.Click
    End Sub

    Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
        Dim newAccount As Integer
        Dim newMember As Integer
        Dim payDate As Date

            newAccount = CInt(txtAccount.Text)
            newMember = CInt(txtMember.Text)
            payDate = DateTimePicker1.Value.Date

            Dim newPaymentsRow As DataRow = karateDataSet.Tables("Payments").NewRow()
            newPaymentsRow("Account") = newAccount
            newPaymentsRow("Member_ID") = newMember
            newPaymentsRow("Payment_Date") = payDate

        Catch ex As Exception
            MessageBox.Show("Only numeric values can be added")
        End Try
    End Sub
End Class