Insert DataGridViewComboBoxColumn() showing the DropDownList when not selected.

I have a problem with a DataGridView, i’ve made a DataGridViewComboBoxColumn to add to the grid.

If i click the column.

If the column is selected it still have the DropDownlist with the arrow showing.

If the column is not selected it not looks like a DropDownList to click

In my code i use something like.

Dim column As DataGridViewComboBoxColumn = New DataGridViewComboBoxColumn()
Dim cell As DataGridViewComboBoxCell = New DataGridViewComboBoxCell()
column.CellTemplate = cell
column.Items.Add("40")
column.Items.Add("70")
column.Items.Add("90")
column.Items.Add("100")
column.DropDownStyle = ComboBoxStyle.DropDownList
column.DisplayMember = "Value"
column.DefaultCellStyle.BackColor = Drawing.Color.White
column.ReadOnly = False
GridView.Columns.Add(column)


Don’t know what i’m doing wrong.
Tks in advance.