ineer join in access in vb.net how to update tow table

Revision 2
im making tow table where ineer join connect awanted to save and update an iwanted to change in my program and update it this is my cod to connect

try
    cmd.CommandText = "SELECT Employee.Emp_ID ,Employee.Emp_Name ,Employee.Emp_Tel , Dep_Name FROM Employee , Department where Employee.Dep_id = Department.Dep_id "

    DataAdapter1 = New OleDbDataAdapter(cmd)
    Dim builder As New OleDbCommandBuilder(DataAdapter1)

    DataSet1 = New DataSet()

    'Load some data into the DGV
    DataAdapter1.Fill(DataSet1, "DataTable1")
    BindingSource1 = New BindingSource(DataSet1, "DataTable1")
    BindingSource2 = New BindingSource(DataSet1, "DataTable1")

    Label7.DataBindings.Add("Text",
    BindingSource1, "Emp_ID", True, 1, "")

    TextBox1.DataBindings.Add("Text", BindingSource1, "Emp_Name", True, 1, "")
    TextBox2.DataBindings.Add("Text", BindingSource1, "Emp_Tel", True, 1, "")
    TextBox3.DataBindings.Add("Text", BindingSource1, "Dep_Name", True, 1, "")
    ' TextBox4.DataBindings.Add("Text", BindingSource1, "price", True, 1, "")
    ' TextBox5.DataBindings.Add("Text", BindingSource1, "total", True, 1, "")

    DataGridView1.DataSource = BindingSource1
    ComboBox1.DataSource = BindingSource1
    ComboBox1.DisplayMember = "Emp_Name"
    ComboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend
    ComboBox1.AutoCompleteSource = AutoCompleteSource.ListItems

    DataGridView1.Columns(0).Width = 40
    DataGridView1.Columns(1).Width = 100
    DataGridView1.Columns(2).Width = 70
    DataGridView1.Columns(3).Width = 70
    ' DataGridView1.Columns(4).Width = 70
    ' DataGridView1.Columns(5).Width = 100

    DataGridView1.Columns(0).HeaderText = "?????"
    DataGridView1.Columns(1).HeaderText = "?????"
    DataGridView1.Columns(2).HeaderText = "??????"
    DataGridView1.Columns(3).HeaderText = "??????"
    ' DataGridView1.Columns(4).HeaderText = "?????"
    ' DataGridView1.Columns(5).HeaderText = "????????"

    DataGridView1.Columns(2).AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill
    DataGridView1.Columns(0).ReadOnly = True
    DataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter
    DataGridView1.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter
    DataGridView1.Sort(DataGridView1.Columns(1), System.ComponentModel.ListSortDirection.Ascending)
    count()
Catch ex As Exception
    MessageBox.Show(ex.Message, "?????", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try

and this code make proplem to update tow taple

buton _click

If BindingSource1.Count = 0 Then Beep() : Exit Sub
    BindingSource1.EndEdit()
    DataAdapter1.Update(DataSet1, "DataTable1 ")
    count()