How Do I set defaults for a cell in a datagridview in VB.net 2.0 winforms?

Hi Experts.

  I have some examples from a book (VB2005 DB Programming - wrox press) I'm trying to follow.

  I have a Datagridview on a form.

  on the top of the form is the standard first, prev, counter, next, last navigation buttons
  next to them are buttons to add and delete a record (and of course the save button)

  I need to default one field in the table when a new record is added.

 I added the following procedures: (per page 150-151)

Private Sub UsersDataGridView_DefaultValuesNeeded(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewRowEventArgs) Handles UsersDataGridView.DefaultValuesNeeded
        setdefaults(e.Row)
        MsgBox("in firstsub")
End Sub

Private Sub setdefaults(ByVal rowadded As DataGridViewRow)
        rowadded.Cells("DataGridViewTextBoxColumn8").Value = "EGL"
        MsgBox("insecond sub")
End Sub

The above code works great if I click anywhere in the row indicated by the >* symbol on the left - both msgboxes display and my value is added.
However it doesn't fire if I click the yellow  + Icon on the navigation toolstrip.

I tried this but it didn't work:
Private Sub BindingNavigatorAddNewItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BindingNavigatorAddNewItem.Click
        Dim x As System.Windows.Forms.DataGridViewRowEventArgs
        x = CType(e, System.Windows.Forms.DataGridViewRowEventArgs)
        setdefaults(x.Row)
End Sub


Thanks in advance for your help on this!