problem with autocomplete

The another problem i solved, because just have to render the view

  new   <%= text_field_with_auto_complete :alergias_paciente, :alergia_nombre, { :size =30 },     { :url =alergia_path(:js), :method =:get, :param_name = 'search'} %>

alergia controller   def index      @alergias = Alergia.find(:all, :conditions =['nombre LIKE ?', "%#{params[:search]}%"])       end

alergias_paciente model

def alergia_nombre   return alergia.nombre if alergia end map.resources :alergias_pacientes def alergia_nombre=(nombre)   self.alergia = Alergia.find_by_nombre(nombre) unless nombre.blank? end

  def index      @alergias = Alergia.find(:all, :conditions =['nombre LIKE ?', "%#{params[:search]}%"])    end

routes rb map.resources :alergias_pacientes

application.html.erb

<%= javascript_include_tag :defaults %>

js shows me alergias but it does not autocomplete the form the I remove formated because it tell me, was deprecated. in the other without the formated continues ok. as if it sought to apply the js or maybe is wrog the way i map or something like that what do you say?