update bindingsource

[kebo]

I have a dataset (dS), adapter(aD) and bindingsource(bS) I am using in a form. The datasource for bS is dS, and I am filling the adapter in the form's Load event with a table (tbl) from the dataset.

On the form I have a listbox and a textbox with the following properties set

ListBox.DataSource = bS
ListBox.DisplayMember = <coloumn 1 of tbl>

The textbox.text property is bound to <column 2 of tbl>

When I change the selected item of the listbox, the text in the textbox changes to the appropriate data from the dataset, so I know that part of what I am doing works.

When I change the text in the textbox however, the database is not updating, and I assume I am missing something small.
my code....

Public Class RecipeTypesForm
 
    Private Sub RecipeTypesForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
 
        Me.RecipeTypesTableTableAdapter.Fill(Me.BrewBaseDataSet.RecipeTypesTable)
 
    End Sub
 
    Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
 
        Dim i As Integer = ListBox1.SelectedIndex
        If i > -1 Then
            Me.RecipeTypesTableBindingSource.Position = i
        End If
 
    End Sub
 
    Private Sub OKButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OKButton.Click
 
        Me.RecipeTypesTableTableAdapter.Update(Me.BrewBaseDataSet.RecipeTypesTable)
        Me.Close()
 
    End Sub
 
End Class

I am guessing I am not updating something correctly to finalize the change in the database when I close the form. Can any one see what I am not doing right?
thanks
kevin