I'm starting to create a WEB application using JSF, however I try to insert some data through a form and the error below is displayed:

  

/usuario.xhtml @ 19.72 value="# {BlueEmail user"): Target   Unreachable, identifier 'userBean' resolved to null

My save method:

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";
        }
        //salva usuario
        return "sucesso";           
    }

Xhtml Page

         User registration

User Registration

    <h:outputLabel value="e-Mail:" for="email" />
    <h:inputText id="email" label="email" value="#{usuarioBean.email}" />

    <h:outputLabel value="CPF:" for="cpf" />
    <h:inputText id="cpf" label="cpf" value="#{usuarioBean.cpf}" />

    <h:outputLabel value="Senha:" for="senha" />
    <h:inputSecret id="senha" label="Senha" value="#{usuarioBean.senha}" required="true"/>

    <h:outputLabel value="Confirmar Senha:" for="confirmarsenha" />
    <h:inputSecret id="confirmarSenha" label="Confirmar Senha" value="#{usuarioBean.confirmaSenha}" required="true" />

    <h:outputText/>
    <h:commandButton action="#{usuarioBean.salvar}" value="Salvar" />
 </h:panelGrid>
</h:form>
<hr />
</h:body>

My Bean Class:

@ManagedBean (name="UserBean") @RequestScoped public class UserBean {

private String nome;
private String cpf;
private String senha;
private String confirmaSenha;

@ManagedProperty(value="#{param}")
private Map<String,String> parametros;

//Método de Operação
public String operacao(){
    //executa a operação
    return "resultado";

}

public String novo(){
    return "usuario";
}

//Getters e Setters
public void setNome(String nome) {
    this.nome = nome;
}
public String getNome() {
    return nome;
}   
public String getCpf() {
    return cpf;
}
public void setEmail(String cpf) {
    this.cpf= cpf;
}
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 salvar(){
    FacesContext context = FacesContext.getCurrentInstance();
    if(!this.senha.equalsIgnoreCase(this.confirmaSenha)){
        context.addMessage(null,new FacesMessage(FacesMessage.SEVERITY_ERROR,"Senha confirmada incorretamente",""));
        return "usuario";
    }
    //salva usuario
    return "sucesso";           
}

}

Lib:

Can anyone help me?