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I have problem running more than 03 managed bean on jsf having error message

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Joined: 2013-03-04

Hi every body.
I m using netbeans 7.2.1 as IDE. I m trying to develop an Multiple Questions Choices web app with various users profile, based on JSF framework and running on GLASSFISH3+ server, and i had problem when introducing a fourth managed bean. So i made a test using 4 managed bean with the same code having a simple string attribute. testBean, test2Bean, test3Bean, test4Bean. here is the sample code:
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
public class test3Bean implements {
private String s;
public String getS() {
return s;
public void setS(String s) {
this.s = s;

The web app has a simple index.xhtml reading 4 input to be set to the 4 managed bean:

Enter testword 1

Enter testword 2

Enter testword 3

Enter testword 4

the reponse.xhtml would show the 4 inputs.

When running the application the undex.xhtml show up and after i entred words on h:inputText and submitting i have this error:

/index.xhtml @14,107 value="#{test4.s}": Target Unreachable, identifier 'test4' resolved to null.

I dont understand with the same code testBean 1,2, and 3 has been processed by Mojarra/faclets engine and not test4Bean.

ANY Idea please.