Inheritance and DefaultBeanPropertyTableProvider

Hi All! I'm having troubles displaying data on a beantable. I have two clases :
public class A implements Identifieable<Integer>,Serializable{
...
}
public class B exends A{
...
}

If I create DefaultBeanPropertyTableProvider(B.class, criteria) I don't see the rows, only the header.
If I create DefaultBeanPropertyTableProvider(A.class, criteria) I  see the rows.
How should I handle this?I need to display propertys of class B.
On the other hand, how can I change the BeanFilterPanel "Filter" text?Can I use something
like CreateBeanPanel(...,new Model("Search")....


Thanks in advance,
Regards,
Wadi