RadContextMenu in header

[cielo valdoz]

Hi,

I have a contextmenu in the header of a gridview, then inside the menuitem there's a checkbox wherein when selected it will call the command but it's not firing. I'm not sure if I have to include the AncestorLevel or use PlacementTarget.

VIEW

<telerik:GridViewDataColumn.Header>
                           <ToggleButton HorizontalAlignment="Left" IsChecked="{Binding IsOpen, ElementName=radContextMenuLink, Mode=TwoWay}">
                               <telerik:RadContextMenu.ContextMenu>
                                   <telerik:RadContextMenu x:Name="radContextMenuLink" Placement="Bottom">
                                       <telerik:RadMenuItem>
                                           <telerik:RadMenuItem.Icon>
                                               <Image Source="/Merchandise_Link;component/Images/link-icon.png" Stretch="Uniform" />
                                           </telerik:RadMenuItem.Icon>
                                           <telerik:RadMenuItem.HeaderTemplate>
                                               <DataTemplate>
                                                   <CheckBox Name="chkHasLink" Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=telerik:RadGridView}, Path=DataContext.HasLinkChangedCommand, Mode=TwoWay}" CommandParameter="{Binding IsChecked, ElementName=chkHasLink}" />
                                               </DataTemplate>
                                           </telerik:RadMenuItem.HeaderTemplate>
                                       </telerik:RadMenuItem>
                                       <telerik:RadMenuItem>
                                           <telerik:RadMenuItem.Icon>
                                               <Image Source="/Merchandise_Link;component/Images/link-break-icon.png" Stretch="Uniform" />
                                           </telerik:RadMenuItem.Icon>
                                           <telerik:RadMenuItem.HeaderTemplate>
                                               <DataTemplate>
                                                   <CheckBox Name="chkNoLink" Command="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=telerik:RadGridView}, Path=DataContext.HasLinkChangedCommand}" CommandParameter="{Binding IsChecked, ElementName=chkNoLink}" />
                                               </DataTemplate>
                                           </telerik:RadMenuItem.HeaderTemplate>
                                       </telerik:RadMenuItem>
                                   </telerik:RadContextMenu>
                               </telerik:RadContextMenu.ContextMenu>
                           </ToggleButton>
                       </telerik:GridViewDataColumn.Header>

ViewModel

HasLinkChangedCommand = New DelegateCommand(Of Object)(AddressOf subHasLinkChanged)

Private Sub subHasLinkChanged(ByVal objLink As Object)
    'do something here
End Sub

Thanks,
Cielo