Problem to pass data into view if i use stored procedure in MVC 3 with Razor

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MVC3

Hi,
I am creating a small application in MVC3 with Razor. I am using Database first logic by using entity framework (.edmx). I am using stored procedure for every task by using "Add Function Import..."

Now i have a procedure to select a perticuler student record, and this works perfectly but when i want to pass it on corresponding View which is strongly typed with Edit scaffold template then i found following error :

The model item passed into the dictionary is of type 'System.Data.Objects.ObjectResult`1[StudentAlumni.Models.student]', but this dictionary requires a model item of type 'StudentAlumni.Models.student'.

following code is written in my ActionResult Method :

public ActionResult Edit(int id)
       {
           var st = db.proc_SelectAlumniStudent(id);
           if (st == null)
               return RedirectToAction("Index");
           else
               return View(st);
       }

My model is of type: @model StudentAlumni.Models.student


The same problem is also found when i use Delete handler, my question is that how to pass model type values if i use stored procedure and get result in single variable (st in my case) and pass it to View?
Please help me.
Thanks