Erro exemplo java para web: Target Unreachable, identifier 'usuarioBean' resolved to null

Pessoal, to estudando JavaEE com o livro java para web que acabei de comprar.

Em um dos primeiros exemplos, está ocorrendo um erro:

/usuario.xhtml @18,21 value="#{usuarioBean.nome}": Target Unreachable, identifier 'usuarioBean' resolved to null

Segue a classe e o faceConfig

UsuarioBean.class

package financeiro.web;

import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;

public class UsuarioBean {
	private String nome;
	private String email;
	private String senha;
	private String confirmaSenha;

	public String getNome() {
		return nome;
	}

	public void setNome(String nome) {
		this.nome = nome;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getSenha() {
		return senha;
	}

	public void setSenha(String senha) {
		this.senha = senha;
	}

	public String getConfirmaSenha() {
		return confirmaSenha;
	}

	public void setConfirmaSenha(String confirmaSenha) {
		this.confirmaSenha = confirmaSenha;
	}
	public String novo(){
		return "usuario";
	}
	public String salvar(){
		FacesContext context = FacesContext.getCurrentInstance();
		if(!this.senha.equalsIgnoreCase(this.confirmaSenha)){
			context.addMessage(null, new FacesMessage(FacesMessage.SEVERITY_ERROR,
					"Senha confirmada incorretamente",""));
			return "usuario";
		}
		return "sucesso";
	}
}

face-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<faces-config version="2.0"
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd">
	
<!-- Bean Usuário -->
<managed-bean>
	<managed-bean-name>usuarioBean</managed-bean-name>
	<managed-bean-class>financeiro.web.UsuarioBean</managed-bean-class>
	<managed-bean-scope>request</managed-bean-scope>
	<!-- 
	<managed-property>
		<property-name>origemCadastro</property-name>
		<value>internet</value>
	</managed-property>
	<managed-property>
		<property-name>relacaoConhecimento</property-name>
		<value>#{comoConheceuOSite}</value>
	</managed-property>
	<managed-property>
		<property-name>endereco</property-name>
		<null-value/>
	</managed-property>
	-->
</managed-bean> 
<!-- Bean ComoConheceuOSite -->
<managed-bean>
	<managed-bean-name>comoConheceuOSiteMap</managed-bean-name>
	<managed-bean-class>java.util.HashMap</managed-bean-class>
	<managed-bean-scope>none</managed-bean-scope>
	<map-entries>
		<map-entry><key>B</key><value>Blogs</value></map-entry>
		<map-entry><key>R</key><value>Revistas</value></map-entry>
		<map-entry><key>A</key><value>Amigos</value></map-entry>
		<map-entry><key>F</key><value>Ferramentas de Buscas</value></map-entry>
	</map-entries>
</managed-bean>
<managed-bean>
	<managed-bean-name>cidadeList</managed-bean-name>
	<managed-bean-class>java.util.ArrayList</managed-bean-class>
	<managed-bean-scope>request</managed-bean-scope>
	<list-entries>
		<value>Joinville</value>
		<value>São Paulo</value>
		<value>Rio de Janeiro</value>
		<value>Brasília</value>
	</list-entries>
</managed-bean>
</faces-config>

usuario.xhtml

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!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://java.sun.com/jsf/html"
	xmlns:f="http://java.sun.com/jsf/core">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Cadastro de Usuário</title>
</head>
<body>
	<h1>Cadastro de Usuário</h1>
	<hr />
	<h:form>
		<h:messages></h:messages>
		<h:panelGrid columns="2">
			<h:outputLabel value="Nome" for="nome"></h:outputLabel>
			<h:inputText id="nome" label="Nome" value="#{usuarioBean.nome}"
				required="true"></h:inputText>
			<h:outputLabel value="E-Mail" for="email"></h:outputLabel>
			<h:inputText id="email" value="#{usuarioBean.email}" label="email" />
			<h:outputFormat value="Senha" for="senha" />
			<h:inputSecret value="#{usuarioBean.senha}" id="senha" label="senha"
				required="true"></h:inputSecret>
			<h:outputLabel value="Confirmar Senha" for="confirmarsenha"></h:outputLabel>
			<h:inputSecret id="confirmarsenha" label="Confirmar Senha"
				required="true" value="#{usuarioBean.comfirmaSenha}"></h:inputSecret>
			<h:outputText></h:outputText>
			<h:commandButton value="Salvar" action="#{usuarioBean.salvar}" />
		</h:panelGrid>
	</h:form>
	<hr />
</body>
</html>

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