Estoy usando Entity Framework y MVC3, y mi problema es que no puedo colocar los Controladores si la clase se hereda de otra Clase.

Ejemplo:

Esta es la clase base

using System;
using System.Collections.Generic;

    namespace CRMEntities
    {
        public partial class Company
        {
            public int Id { get; set; }
        }

    }

Esta es la clase principal (niño)

using System;
using System.Collections.Generic;

namespace CRMEntities
{
    public partial class Lead : Company
    {
        public Lead()
        {
            this.Status = 1;
            this.IsQualified = false;

        }

        public Nullable<short> Status { get; set; }
        public Nullable<bool> IsQualified { get; set; }


    }


}

Cuando intenté agregar el controlador de abajo viene el error ...

Clase de contexto

using System;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;

namespace CRMEntities
{
    public partial class CRMWebContainer : DbContext
    {
        public CRMWebContainer()
            : base("name=CRMWebContainer")
        {
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            throw new UnintentionalCodeFirstException();
        }

        public DbSet<Employee> Employees { get; set; }
        public DbSet<Contact> Contacts { get; set; }
        public DbSet<Product> Products { get; set; }
        public DbSet<Location> Locations { get; set; }
        public DbSet<Task> Tasks { get; set; }
        public DbSet<EventInfo> EventInfoes { get; set; }
        public DbSet<Opportunity> Opportunities { get; set; }
        public DbSet<Comment> Comments { get; set; }
        public DbSet<Document> Documents { get; set; }
        public DbSet<LoginInformation> LoginInformations { get; set; }
        public DbSet<CRMLog> CRMLogs { get; set; }
        public DbSet<EntitySharing> EntitySharings { get; set; }
        public DbSet<EntityFlagging> EntityFlaggings { get; set; }
        public DbSet<EntityTagging> EntityTaggings { get; set; }
        public DbSet<EntitySubscribing> EntitySubscribings { get; set; }
        public DbSet<Compapny> Compapnies { get; set; }
    }
}