I have a controller with the following two Edit methods. The edit form displays correctly with all additional dropdown lists from the FormViewModel. However, when I changed some field values and submitted the form. None of the changed fields were saved. The fields in the postbask collection have default or null values. I have another edit form which update another table. On submit, the changed values are saved. Does anyone know why?

// GET: /Transfers/Edit/5
public ActionResult Edit(int id)
{
    Transfer transfer = myRepository.GetTransfer(id);

    if (transfer == null)
        return View("NotFound");

    return View(new TransferFormViewModel(transfer));

} 

//
// POST: /Transfers/Edit/5

[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Edit(int id, Transfer collection)
{

    Transfer transfer = vetsRepository.GetTransfer(id);

    if (transfer == null)
        return View("NotFound");
    else
    {
        try
        {
            UpdateModel(transfer);
            vetsRepository.Save();

            return RedirectToAction("Details", new { id = transfer.TransfersID });
        }
        catch
        {
            ModelState.AddModelErrors(transfer.GetRuleViolations());

            return View(new TransferFormViewModel(transfer));
        }
    }
}