On this exemple i can only edit the checkbox4 column. I dont understand why i cant edit my title and date1 column. can someone help me please.

All my columns is .IsBound=False

My code : 

GridBase.DisplayLayout.AutoGenerateColumns = False
GridBase.DataSource = objDS.Tables("Table")
GridBase.DataBind()

        With GridBase.DisplayLayout.Bands(0).Columns
            .FromKey("noid").Hidden = True

            .FromKey("title").Header.Caption = "Title"
            .FromKey("title").Width = Unit.Pixel(70)
            .FromKey("title").AllowUpdate = AllowUpdate.Yes

            .FromKey("checkbox4").Header.Caption = "Exclude"
            .FromKey("checkbox4").Width = Unit.Pixel(50)
            .FromKey("checkbox4").Type = ColumnType.CheckBox
            .FromKey("checkbox4").AllowUpdate = AllowUpdate.Yes

            .FromKey("date1").Header.Caption = "Date"
            .FromKey("date1").Width = Unit.Pixel(90)
            .FromKey("date1").Type = ColumnType.Custom
            .FromKey("date1").DataType = "System.DateTime"
            .FromKey("date1").Format = "yyyy-MM-dd"
            .FromKey("date1").EditorControlID = WebDateChooser1.UniqueID
            .FromKey("date1").AllowUpdate = AllowUpdate.Yes
        End With