[Solved] Ajax bindind & entity.dynamicproxies

[raphael]

Hi everybody.

I'm trying to do an ajax bind to an entity that comes from a genericrepository that i created. after trying with the direct binding I tried the ajaxcustombinding but neither one of them works.
when I bind the data at the load of the page in the index the data are bound
 

public ViewResult Index(int? SelectedDepartment)
        {
            IEnumerable data = Getcourses();
            return View(data);
        }

private IEnumerable Getcourses()
        {
            var mo = unitOfWork.CourseRepository.Get(
                       orderBy: q => q.OrderBy(d => d.CourseID),
                       includeProperties: "Department");
            return mo;
        }

but when I change my page this way the data are not bound to the grid

public ViewResult Index(int? SelectedDepartment)
{
                return View();
}
[GridAction(EnableCustomBinding = true)]
public ActionResult _AjaxBinding(GridCommand command)
{
    IEnumerable data = Getcourses();
    return View(new GridModel { Data = data});
}
private IEnumerable Getcourses()
{
    var mo = unitOfWork.CourseRepository.Get(
               orderBy: q => q.OrderByDescending(d => d.CourseID),
               includeProperties: "Department");
    return mo;
}

on the index.cshtml i have always this code this code

@model IEnumerable<ContosoUniversity.Models.Course>
@(Html.Telerik().Grid(Model)
        .Name("Grid")
        .PrefixUrlParameters(false)
        .DataBinding(dataBinding => dataBinding.Ajax().Select("_AjaxBinding", "Course"))
        .Columns(columns =>
        {
            columns.Bound(o => o.CourseID).Width(50);
            columns.Bound(o => o.Title).Width(100);
            columns.Bound(o => o.Credits).Width(200);
        })
        .EnableCustomBinding(true)
        .Sortable()
        .Groupable()
)

I don't understand if the problem is just because i get type of entity from the generic repository

System.Data.Entity.DynamicProxies.Course_5E43C6C196972BF0754973E48C9C941092D86818CD94005E9A759B70BF6E48E6

can somebody explain me what i'm doing wrong? thank you very much

raphael