Erro ao executar ManagedBean

javax.el.PropertyNotFoundException: /publico/menu.xhtml @15,136 action="#{listarClienteMB.exibir}": Target Unreachable, identifier 'listarClienteMB' resolved to null: javax.faces.FacesException: #{listarClienteMB.exibir}: javax.el.PropertyNotFoundException: /publico/menu.xhtml @15,136 action="#{listarClienteMB.exibir}": Target Unreachable, identifier 'listarClienteMB' resolved to null

<h:commandLink value="Cliente" style="text-transform:uppercase; color:#929292; font-size:1.1em" action="#{listarClienteMB.exibir}" />

package agencia.turismo.manter.cliente;

import javax.ejb.EJB;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;

import agencia.turismo.facade.manter.cliente.FacadeManterCliente;

@ManagedBean(name="listarClienteMB")
@RequestScoped
public class ListarClienteMB {

	public String LISTAR_CLIENTE = "/publico/listarcliente.xhtml";
	
	@EJB
	private FacadeManterCliente facadeManterCliente;

	
	public String exibir(){
		
		
		return LISTAR_CLIENTE;
	}
	
	
	public FacadeManterCliente getFacadeManterCliente() {
		return facadeManterCliente;
	}

	public void setFacadeManterCliente(FacadeManterCliente facadeManterCliente) {
		this.facadeManterCliente = facadeManterCliente;
	}
	
}