EJB return null Websphere - jsf-2

Question

I'm adjusting my app to work in Websphere 8.5.5 and i found that my app doesn't inject EJB but the same app in Jboss 7.1.1 works ok.
After tha, i create a dummy app and it doesn't work(only add 2 Integers).
Can someone help me?
Edited:
package resources;
import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import co.com.prueba.local.SumadorLocal;
#ManagedBean
#ViewScoped
public class SumadorUI {
private Integer a;
private Integer b;
private Integer c;
#EJB
private SumadorLocal sumadorLocal;
#PostConstruct
private void init(){
System.out.println("Init :"+sumadorLocal);
}
public String sumar(){
c=sumadorLocal.sumador(a, b);
return null;
}
public Integer getA() {
return a;
}
public void setA(Integer a) {
this.a = a;
}
public Integer getB() {
return b;
}
public void setB(Integer b) {
this.b = b;
}
public Integer getC() {
return c;
}
public void setC(Integer c) {
this.c = c;
}
}
UPDATED:
I add new EJB to testing if the problem injection is in ManagedBean or all app, and only the problem is ManagedBean.

Answer 1

After read and tested, i found a solution. In this link explain how create a implementation of DiscoverableInjectionProvider (Class that help to inject EJB instance) https://developer.ibm.com/answers/questions/176344/injection-of-stateless-ejbs-‌​into-jsf-managed-beans.html. With this class and adjust web.xml works for me.