Hi, I'm trying to get my grid to bind to a Linq to Entity Framework data source, but I'm getting an error in the Javascript (attached).

I'm using MVC, and have set up the data model to use remote filtering, paging, grouping and sorting. The controller is set up as follows. Please note that the method GetLinqPagingGridModel simply returns a suitable grid model with the DataSourceUrl set to the LinqInfragisticsGrid action method. The DataSource property for the GridModel doesn't get set.

public ActionResult LinqInfragistics()
{

    GridModel model = InfragisticsGridHelper.GetLinqPagingGridModel(GRID_ID, "ID", Url.Action("LinqInfragisticsGrid"));
    AddInfragisticsGridColumns(model);
    return View("Infragistics", model);
}

[GridDataSourceAction]
public ActionResult LinqInfragisticsGrid()
{
    // Returns the data model as an IQueryable object (required by the grid's data source).
    return View("Infragistics", GetMediaGridDataViaLinq());
}

private IQueryable<MediaBrowserViewModel> GetMediaGridDataViaLinq()
{
    var dataModel = new DataModel();
    IQueryable<MediaBrowserViewModel> model =
        dataModel.tblMedias.Where(
        m => m.IsSystem == "N" || (m.LogicalID >= 0xFFD8 && m.LogicalID <= 0xFFDF) || (m.LogicalID >= 0xFFD0 && m.LogicalID <= 0xFFD7))
        .Select(
            m => new MediaBrowserViewModel
            {
                ID = (long)m.ID,
               LogicalID = (long)m.LogicalID,
               Description = m.Description,
               Option1 = "1",
               Option2 = "2"
           });
    return model;
}

The grid rendering in the razor view is very simple, and looks like -

@(Html.Infragistics().Grid(Model))

Any thoughts on what I'm doing wrong? I'm not getting any errors when I get the data from a stored procedure.