Problem with attribute rendered

[Andrey Ka]

Hello.
I use jsf 2.0, it's implementation mojarra 2.0.3.
I have problem with attribute "rendered". I use it to control visibility of buttons. Visibility works correctly. But when this attribute is set, method doCancelEditBuilding does not called. Instead of redirecting to building_list.xtml page, current page refreshes but some fields of it's bean reset. If I remtove attribute rendered - buttons works correctly.

BuildingBean.java:

  
@ManagedBean
@RequestScoped
public class BuildingBean extends SuperBean{
    private static final long serialVersionUID = 1L;
    
    private Building currentBuilding = new Building();
    
    public String doCancelEditBuilding(){
   currentBuilding = new Building();
   return "building_list";
    }
    
    //getters, setters

}

building_details.xhtml:

....
<h:commandButton type="image" action="#{buildingBean.doCancelEditBuilding}" image="/i/cancel.png" rendered="#{empty buildingBean.currentBuilding.id}"/>
.....

Can yoy help me with my problem?

P.S. Sorry for my english...