HeaderContextMenu with Client-Side Binding

[Tarek]

I am using RadGrid with Client-Side Binding (WCF Data Service), but Filtering and Sorting from the "Header Context Menu" don't work.
Any possible solution ?  

[Tarek]

Sorry for the inconvenience but this issue is already posted
http://www.telerik.com/community/forums/aspnet-ajax/grid/headercontextmenu-is-not-workign-with-client-side-bounded-radgrid.aspx