How to post model with kendo window refresh? - asp.net-mvc-4

Question

How to pass model with Kendo Window refresh option ?
I am using below code for that in my partial view:-
var proWindow = $("#productWindow").data("kendoWindow");
proWindow.refresh({
url: "../../Product/UpdateProduct",
type: "POST",
contentType:"application/json",
data: { prodModel: $("form").serialize()
});
And below is the code for Controller:-
[HttpPost]
public ActionResult UpdateProduct(ProductMaintViewModel prodModel)
{
}
But i am getting null on my model parameter in controller.
Can any one have any idea about that,means how we can post the whole model with kendo window refresh data option in jquery/javascript ?
FYI, i am working on ASP.NET MVC 4 application.
Below is my ProductMaintViewModel class :-
public class ProductMaintViewModel
{
[HiddenInput(DisplayValue = false)]
public int ProductID { get; set; }
public int? CustomerId { get; set; }
public int? InsuranceId { get; set; }
[Required]
[StringLength(50)]
[Remote("CheckProductName", "Product", ErrorMessage = "Product Name already exists.")]
[Display(Name = "Name")]
public string Name { get; set; }
[StringLength(100)]
[Display(Name = "Description")]
public string Description { get; set; }
public bool IsDraft { get; set; }
[Required]
[Display(Name = "Product Type")]
public int? SelectedProductTypeID { get; set; }
public IEnumerable<SelectListItem> ProductTypes { get; set; }
public bool IsDeleted { get; set; }
[Display(Name = "Customer Type")]
public int? SelectedCustomerSubTypeId { get; set; }
public IEnumerable<SelectListItem> CustomerSubTypes { get; set; }
public IEnumerable<SelectListItem> AvailableLabor { get; set; }
}