ปัญหาเรื่อง INNER JOIN vb.net acess 2013 visual basic 2015

Imports System.Data.OleDb
Public Class Form1
    Dim conn As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:\WindowsApplication1\WindowsApplication1\bin\Debug\POSSYTEM.accdb")
    Dim cmd As New OleDbCommand
    Dim da As New OleDbDataAdapter
    Dim dt As DataTable
    Dim ds As New DataSet


    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        conn.Open()
        dt = New DataTable
        ds = New DataSet
        ds.Tables.Add(dt)
        da = New OleDbDataAdapter("SELECT * FROM Sales inner join PaymentMethod on Sales.PaymentMethod=PaymentMethod.Paymentype", conn)
        da.Fill(dt)
        DataGridView1.DataSource = dt.DefaultView
        conn.Close()
    End Sub
End Class