MVC Controller's Create method is loosing data while saving

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MVC

hi i have created models CLinicTypes and ClinicDetails like this

public class ClinicTypes
    {
        public int ID { get; set; }
        public string Title { get; set; }

      public SelectList ClinicTypeList { get; set; }

    }

public class ClinicDetails
    {
        public int ID { get; set; }

        [Display(Name = "Clinic Name")]
        public string ClinicName { get; set; }

        [Display(Name = "Clinic Type")]
        public int ClinicTypeID { get; set; }
        public string CPersonName{ get; set; }
        public string CPersonEmail { get; set; }
        public string CPersonMobile { get; set; }
        public string CPersonPhone { get; set; }

    }

i created my viewmodel like this

public class ClinicDetailViewModel
   {

       private OMCareContext db = new OMCareContext();
       public IEnumerable<SelectListItem> ClinicTypes { get; set; }
       public ClinicDetails ClinicDetail { get; set; }


       //constructor
       public ClinicDetailViewModel(ClinicDetails detail)
       {
           ClinicDetail = detail;
           ClinicTypes = PopulateClinicTypes();
       }
       //end constructor
       private IEnumerable<SelectListItem> PopulateClinicTypes()
       {
           var cTypesQuery = db.ClinicType.OrderBy(t => t.ID);
           return new SelectList(cTypesQuery, "ID", "Title");
       }

i changed my controller post method

public ActionResult Create([Bind(Include = "ID,ClinicName,ClinicTypeID,CPersonName,CPersonEmail,CPersonMobile,CPersonPhone")] ClinicDetails clinicDetails)
                {
                    if (ModelState.IsValid)
                    {

                        db.ClinicDetail.Add(clinicDetails);
                        db.SaveChanges();
                        return RedirectToAction("Index");
                    }

           // return View(clinicDetails);commented by me and added follow line
           return View( new ClinicDetailViewModel(clinicDetails));
                }

and my view is

@Html.DropDownListFor(model => model.ClinicDetail.ClinicTypeID,Model.ClinicTypes, "--Select a tyre type--")
                @Html.ValidationMessageFor(model => model.ClinicDetail.ClinicTypeID)

it is populating dropdown list but it is saving nullvalues for clinicdetails entities and 0 for clinictypeid.

i need help in this.
Thanks