Target Unreachable, identifier resolved to null - JSF

But none of resolutions helped me. When I click command button (on page, please see xhtml file) I got:

An Error Occurred:
javax.el.PropertyNotFoundException: /navigate.xhtml @15,90 action="#{navigator.choosePage}": Target Unreachable, identifier 'navigator' resolved to null

I can get why. Why this bean is not visible in jsf?

Using java8, j2ee 7, tomcat 6.0.44

My pom.xml:

<packaging>war</packaging>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.6</version>
            <configuration>
                <warName>jsfTut</warName>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <!-- JSF deps -->
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-api</artifactId>
        <version>2.2.12</version>
    </dependency>
    <dependency>
        <groupId>com.sun.faces</groupId>
        <artifactId>jsf-impl</artifactId>
        <version>2.2.12</version>
    </dependency>
    <!-- others -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency>
    <dependency>
        <groupId>org.primefaces</groupId>
        <artifactId>primefaces</artifactId>
        <version>5.3</version>
    </dependency>
</dependencies>

My web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
     version="3.1">

<display-name>JSF</display-name>

<context-param>
    <param-name>javax.faces.PROJECT_STAGE</param-name>
    <param-value>Development</param-value>
</context-param>
<context-param>
    <param-name>javax.faces.CONFIG_FILES</param-name>
    <param-value>/WEB-INF/faces-config.xml</param-value>
</context-param>

<welcome-file-list>
    <welcome-file>faces/index.xhtml</welcome-file>
</welcome-file-list>

<servlet>
    <servlet-name>JSF</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>JSF</servlet-name>
    <url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
    <servlet-name>JSF</servlet-name>
    <url-pattern>*.jsf</url-pattern>
</servlet-mapping>

faces-config.xml:

<?xml version='1.0' encoding='UTF-8'?>
<faces-config version="2.2" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd">
</faces-config>

Simple class:

package pl.sarseth.jsf;
import javax.faces.bean.ManagedBean;

@ManagedBean(name = "navigator")
public class Navigator {

    public String choosePage(){
        if(Math.random() > 0.5){
            return "result-page-1";
        } else {
            return "result-page-2";
        }
    }
}

And xhtml file:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:h="http://xmlns.jcp.org/jsf/html">
<h:head>
    <title>My JSF page</title>
</h:head>
<h:body>
    <h1>Navigate via Java</h1>
    <fieldset>
        <legend>Use Java to Navigate to Results Page</legend>
        <h:form>
            Press button to get one of two possible results pages.<br/>
            <h:commandButton value="Go to Random Page" action="#{navigator.choosePage}"/>
        </h:form>
    </fieldset>
</h:body>
</html>

Project structure is this:

project
---src
   ---main
      ---java
         ---pl.sarseth.jsf
            ---Navigator.java
      ---webapp
         ---WEB-INF
            ---faces-config.xml
            ---web.xml
         ---index.xhtml
         ---navigate.xhtml
 ---pom.xml

Solution

As @BalusC said in comment. Problem was in tomcat 6. Had to upgrade to newer version of tomcat - 8. Many kudos.