Native SQL is not working

[Hussein Baghdadi]

Hi.
I'm trying to use some native SQL queries in my Hibernate application.
I tried those :

select title from book_table order by releasing_date desc limit 5

SELECT {b}.title as {b.title} FROM book_table {b}

But neither works (a null list is returned).
(I'm using Hibernate3.2.2 and Spring1.2.4)