the problem was solved, i use like that:
aspx:
<telerik:TreeListTemplateColumn UniqueName="select">
<HeaderTemplate>
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="ss" runat="server" CommandName="Select" Width="24px" OnCheckedChanged="SelectButton_CheckedChanged" AutoPostBack="true"></asp:CheckBox>
</ItemTemplate>
</telerik:TreeListTemplateColumn>
C#:
if (e.Item is TreeListDataItem)
{
TreeListDataItem Item = (TreeListDataItem)e.Item;
if(Convert.ToInt32(Item.GetDataKeyValue("ID"))>=20000)
(Item["select"].FindControl("ss") as CheckBox).Visible = false;
}