The paging component cannot be removed manually?

Hi everyone, I'm a beginner using ZK, but my problem is when a click on listbox and then
bandbox closes.. an error is thrown : Italic textThe paging component cannot be removed manually. It is removed automatically when changing the mold
and how can i limit the number of rows ? by default is 20 rows i'd like i was 10 rows...

Here is the code:

zul file

---

<bandbox id="bbxDistrito" >
<bandpopup>
<vbox>
<hbox>
Buscar
<textbox />
</hbox>
<listbox id="lbxDistrito" width="800px" mold="paging">
<listhead>
<!--listheader label="Id" width="10%"/-->
<listheader label="Departamento" width="20%" />
<listheader label="Provincia" width="30%" />
<listheader label="Distrito" width="50%" />
</listhead>
<listitem>
<listcell id="lclIdDist" />
<listcell id="lclDept" />
<listcell id="lclProv" />
<listcell id="lclDist" />
</listitem>

</listbox>
</vbox>
</bandpopup>
</bandbox>

java file

---

public void onOpen$bbxDistrito(Event evt) throws SQLException, ConecctionException {
this.cargarDistrito();
}
public void onSelect$lbxDistrito(Event evt){
Listitem li = lbxDistrito.getSelectedItem();
tDist=(TOdistrito)li.getValue();
bbxDistrito.setValue(tDist.getDenom());
bbxDistrito.closeDropdown();
}
private void cargarDistrito() throws SQLException, ConecctionException{
List<TOdistrito> lista=cDist.all();
lbxDistrito.getItems().clear();
Iterator<TOdistrito> it = lista.iterator();
while(it.hasNext()){
TOdistrito x=it.next();
Listitem item=new Listitem();
item.setValue(x);
//Listcell cell=new Listcell(x.getIddistrito().toString());
//cell.setParent(item);
Listcell cell=new Listcell(x.getDepartamento());
cell.setParent(item);
cell=new Listcell(x.getProvincia());
cell.setParent(item);
cell=new Listcell(x.getDenom());
cell.setParent(item);
item.setParent(lbxDistrito);
}
}