DatagridviewCombo Box with Name Value List

I cannot get a combox box in a datagridview (Net 2.0) to work correctly using my NVL object using CSLA 1.5.

I try:

With Me.GridComboBox

.DataSource = NVL.GetList.BindableList

.DisplayMember = "Value"

.ValueMember = "Key"

End With

Thanks Richard