[Solved] HttpCompileException error

[Rik]

I'm following this link to see how the GRID works:

http://www.telerik.com/help/aspnet-mvc/telerik-ui-components-grid-introduction.html

after having copied this in the index.aspx:

<%= Html.Telerik().Grid(Model)
        .Name("OrdersGrid")
        .Columns(colums =>
        {
            colums.Bound(o => o.OrderID);
            colums.Bound(o => o.ShipAddress);
            colums.Bound(o => o.RequiredDate);
        })
        .Pageable()
        .Sortable()
%>
when building the application I get this error message:
Error 1 The type or namespace name 'Order' could not be found (are you missing a using directive or an assembly reference?) 

Any help is most approeciated.