I'm new with seam :)

I can list objects with @DataModel when search method is called. I have edit button next to each object returned in dataTable

list.xhtml

<ui:define name="body">
    
    <h:messages styleClass="message"/>
    
    <h:form id="edit">
    
        <rich:panel>
            <f:facet name="header">Edit</f:facet>
         <h:dataTable value="#{eventSearchMatches}" var="e">
            
            <h:column>
                <p><h:outputText value="#{e.startDate}" /></p>
                <p><h:outputText value="#{e.description}" /></p>
            </h:column>
            <h:column>
            <s:button value="Edit" action="#{eventList.editEvent}" />
            </h:column>
            
        </h:dataTable>
      
        </rich:panel>
         
    </h:form>

 </ui:define> 
</ui:composition>

and my class

@Stateful
@Name("eventList")
public class EventBean implements IEventBean {
    @PersistenceContext(unitName="polskirajweb")
        private EntityManager em;
    
    
    @In(value="event", create=true)
    @Out(value="event", required=false)
    private EventEntity mActiveEvent;
    
     private String searchField;
    
    @DataModel(value ="eventSearchMatches")
    List<EventEntity> mEventMatches; 
    
    @DataModelSelection(value ="eventSearchMatches")
    private EventEntity mSelEvents;
    
    public EventEntity getMActiveEvent() {
          return mActiveEvent;
     }

     public void setMActiveEvent(EventEntity activeEvent) {
          mActiveEvent = activeEvent;
     }

     
    
    public String newEvent() {
         newEvent(getMActiveEvent());
         return "success";
    }
    
    public void newEvent(EventEntity g) {
        try {
             if(em.find(EventEntity.class, new Long(g.getEventId())) != null)
             {
                  em.merge(g);
             }
             else
                  em.persist(g);
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }

     public String getSearchField() {
          return searchField;
     }

     public void setSearchField(String searchField) {
          this.searchField = searchField;
     }

     public String search()
     {
          
          String sField = "%" + getSearchField().toUpperCase() + "%";
          try 
          {
               Query q = em.createQuery("select e from EventEntity e where upper(e.city) like :searchField" +
                          " or upper(e.sidecity) like :searchField or upper(e.place) like :searchField" +
                          " or upper(e.description) like :searchField").setParameter("searchField", sField);
               
               mEventMatches = q.getResultList();
          }
          catch (Exception e)
          {
               e.printStackTrace();
          }
          
          mSelEvents = null;
          
          return "success";
     }

     public String editEvent() {
          setMActiveEvent(mSelEvents);
          return "success";
     }
     
     
     @Remove
     @Destroy
     public void destroy() {}


     
} 

I tried to debug and I see that mSelEvents i null all the time, so it looks like selected object from @DataModel is not injected into @DataModelSelection, am I right??

I want to edit variables from list.xhtml but when I enter new variables it will persist new object, it will not be updated.

Why this is not working, what I'm doing wrong???
Please help