One property of a model cant acces

See more:

C#

ASP

ASP.NET

C#4.0

i'm having a trouble trying to get a property of a model from a sql server database, i have define the property on my model but when i do a linq query it doesn't let me get that property

this is my model:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Web.Mvc;

namespace ProgramaAlimenticio.Models
{
    public class RutaMD
    {
        [Key]
        [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
        public virtual int pk_ruta { get; set; }

        [Display(Name = "Ruta")]
        public virtual string nombre { get; set; }

        [Display(Name = "Proveedor")]
        public virtual Nullable<int> fk_proveedor { get; set; }

        [Display(Name = "Programa")]
        public virtual int fk_programa { get; set; }
    }

    [MetadataType(typeof(RutaMD))]
    public partial class Ruta {  }
}

Hope some one help the property that is not available is the fk_programa

when i do a the next query the peroblem happens

var programas = from r in db.Ruta
               join p in db.Programa on r.fk_programa equals p.pk_programa
               into o
               select o;