Invalid object name 'dbo.nazwaTabeli' Entity Framework

namespace MVCDemo.Models
{
   [Table("Pracownicy")]
   public class Employee
   {
      public int EmployeeID { get; set; }
      public string Name { get; set; }
      public string City { get; set; }
   }
}

public class ligiConnection : DbContext
{
    public DbSet<Employee> Employes { get; set; }
}

public ActionResult Details(int id)
{
    ligiConnection ligiConnection = new ligiConnection();
    Employee pracownik = ligiConnection.Employes.Single(emp => emp.EmployeeID == id);
    return View(pracownik);
} 

 public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        Database.SetInitializer<MVCDemo.Models.ligiConnection>(null);
        AreaRegistration.RegisterAllAreas();
        WebApiConfig.Register(GlobalConfiguration.Configuration);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
    }
}

 Employee pracownik = ligiConnection.Employes.Single(emp => emp.EmployeeID == id);