java.lang.IllegalArgumentException：未定义的过滤器参数[p1]

这是我的POJO课程：

@Entity
@Table(name="flight")
@FilterDef(name="f1",parameters=@ParamDef(name="status",type="String"))
@Filter(name="f1",condition="status=:p1")
public class Flight 
{
    @Id
    @Column(name="flightno")
    private int flightNumber;

    @Column(name="src",length=10)
    private String source; 

    @Column(name="dest",length=10)
    private String destination;

    @Column(name="status",length=10)
    private String status;
//setter & getters
}

这是我的Main类代码：

public static void main(String[] args)
{   
       //code for getting SessionFactory Object
        Session session=factory.openSession();
        Transaction tx=session.beginTransaction();

    Query query=session.createQuery("from Flight f");
    Filter filter=session.enableFilter("f1");
    filter.setParameter("p1","DELAYED");
    List list=query.list();
    Iterator itr=list.iterator();
    while(itr.hasNext())
    {
        Flight f=(Flight)itr.next();
        System.out.println("FLIGHT NO:"+f.getFlightNumber());
        System.out.println("SOURCE :"+f.getSource());
        System.out.println("DESTINATION :"+f.getDestination());
        System.out.println("STATUS :"+f.getStatus());

        session.close();
    }

但我是这样的输出：

线程“main”中的异常java.lang.IllegalArgumentException：未定义的过滤器参数[p1]