nHibernate-SaveOrUpdate(没有针对以下对象的持久化)

我有一个抽象类:

[Serializable]
public abstract class BaseModel
{
    public virtual int Id { get; private set; }
    public virtual DateTime? CreatedOn { get; set; }
    public virtual string CreatedBy { get; set; }
    public virtual DateTime? UpdatedOn { get; set; }
    public virtual string UpdatedBy { get; set; }
    public virtual Status Status { get; set; }
}

public enum Status
{
    InActive = 0,
    Active = 1
}

public class Page : BaseModel
{
    public virtual string Name { get; set; }
    public virtual string Route { get; set; }
    public virtual string DisplayName { get; set; }
    public virtual string Parent { get; set; }
}

        for (int i = 0; i < 10; i++)
        {
            DataAccess.McContext.Save(new Models.Page() { Name = "Home" + i, Parent = "0", DisplayName = "Home", Route = "Home", Status = Models.Status.Active });
        }

错误发生在:

    public static void Save(object obj)
    {
        Session.SaveOrUpdate(obj); // Error: No persister for: MVCms.Models.Page
    }

我用流利的nHibernate和我有自动映射。

有人能告诉我我做错了什么吗?任何帮助都将不胜感激