Hello everyone!

I have problem updating fields of entitie beans. I have a page which contains dataTable jsf-component, with one inputText field, I insert some data into. I got also link-cell which fires update to the backing session bean:

table.jsp

<h:dataTable id="animals" value="#{animals}" var="anima">
...
 <h:column>
 <f:facet name="header">
 <h:outputText value="type" />
 </f:facet>
 <h:inputText id="type" value="#{anima.type}" />
 </h:column>
 <h:column>
 <h:commandLink id="changeData" action="#{manage.update}" value="Change"
 />
 </h:column>

Animal is simple entity bean defined this way:

@Entity
@Table(name = "animal")
public class Animal implements Serializable
{
 private String type = "";

 public String getType()
 {
 return type;
 }
 public void setType(String type)
 {
 this.type = type;
 }

...
}

The manage object is session bean described this way:
ManageBean.java

@Stateful
@Name("manage")
@Scope(ScopeType.SESSION)
@Intercept(InterceptionType.ALWAYS)
@Interceptor(SeamInterceptor.class)
@Conversational(ifNotBegunOutcome = "main")
@Local( { Manage.class })
public class ManageBean implements bussiness.Manage, Serializable
{
 @PersistenceContext(unitName = "manager", type = PersistenceContextType.EXTENDED)
 protected EntityManager em;

 @DataModel
 private List<Animal> animals;

 @DataModelSelectionIndex
 private int animalIndex;

 public String update()
 {
 Animal animal = this.animals.get(this.animalIndex);
 em.persist(animal);
 return "end";
 }

 public String obtainAnimals()
 {
 this.animals = (List) this.getAnimals();
 return "success";
 }

 public Collection getAnimals()
 {
 animals = em.createQuery("from Animal a").getResultList();
 return animals;
 }
...
}

obtainAnimals is called from the index.jsp page and redirects to the table.jsp. Everything renders fine, I can see content of my database. I change the value in input text of the animal type in my web-browser. When I press my changeData link, update method of the ManageBean is fired. I obtain entity bean to animal local variable, which represents the row I've chosen in the browser. And then the problem appears - bean contains its old values - no new values inserted in the form. Besides, the new values don't apear enywhere later. Why the component isn't updated before the update call? Haven't I bound it properly?

Thanks in advance for help