enbable disable cehckboxes on checkbox in repeater

[erum]

<asp:Repeater ID="Repeater1"  runat="server">
             <HeaderTemplate>
<table border="1" width="100%">
<tr>
<th>id</th>
<th align=left>Room Categories</th>
<th>single</th>
<th>Double</th>

</tr>
</HeaderTemplate>
<ItemTemplate>

<tr>
<td width="5%">
    <asp:Label ID="Label3" runat="server" Text= '<%# Container.DataItem("packageid")%>' /></td>
<td> <asp:CheckBox ID="chk_packages" AutoPostBack=true runat="server" Text = <%#Container.DataItem("package_name")%> /> </td>

<td><%#Container.DataItem("single_rate")%><asp:CheckBox  AutoPostBack=true ID="single" Enabled=false runat="server" /></td>

<td><%#Container.DataItem("double_rate")%><asp:CheckBox  AutoPostBack=true ID="Double" runat="server" /></td>
<td><asp:Label ID="Label2" runat="server" Text="Label"></asp:Label></td>
</tr>
</ItemTemplate>

<FooterTemplate>
</table>
</FooterTemplate>

             </asp:Repeater>
         
          
		 
        </asp:PlaceHolder>

i want when any packages checbox click in repeater two other checkbox in repeater (single,double get enable) in the same row ,whne i un-unchecked it it also disables them , iw rite some stuff in my application in order to do but its does not working as required

now see the code

Private Sub Repeater1_ItemCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles Repeater1.ItemCreated
        Dim ri As RepeaterItem = CType(e.Item, RepeaterItem)
        Dim elemType As ListItemType = e.Item.ItemType

        If (elemType = ListItemType.Item) OrElse (elemType = ListItemType.AlternatingItem) Then

          Dim cb As CheckBox = ri.FindControl("chk_packages")
            AddHandler cb.CheckedChanged, AddressOf Me.myCheckedChanged
            'cb.CheckedChanged += New EventHandler(CheckedChanged)

          
        End If
    End Sub

Private Sub myCheckedChanged(ByVal sender As Object, ByVal e As EventArgs)

/// i need help here 

end sub