Ajax Framework (CJAX) for Codeigniter 2.x+

[eluser]Alexlv4[/eluser]
Hi

I am new using CJAX.

I want to propagate two dropdown dependent

empresa -> programa -> grupo

I try using this

Code:

$ajax->change("select_empresa",$ajax->call($ajax_relativa."ajax.php?tantum/programa_select/|select_empresa|"));

$ajax->change("select_programa",$ajax->call($ajax_relativa."ajax.php?tantum/grupo_select/|select_programa|"));

My controller in response folder is

Code:

function programa_select($selected)
{
  $ajax = ajax();
  $data = array();
  
  $programas = $this->membership_model->dame_programas_de_empresa($selected);
  
  for ($z = 0; $z < sizeof($programas); $z++) {
   $data[$programas[$z]['programa_id']] = $programas[$z]['programa_nombre'];
  }
  
  $ajax->select('select_programa',$data);
  
}

function grupo_select($selected)
{
  $ajax = ajax();
  $data = array();
  
  $grupos = $this->membership_model->dame_grupos_de_programa($selected);
  
  for ($z = 0; $z < sizeof($grupos); $z++) {
   $data[$grupos[$z]['grupo_id']] = $grupos[$z]['grupo_nombre'];
  }
  
  $ajax->select('select_grupo',$data);
  
}

But just the first works fine

it is posible?
What i am doing wrong?

Thanks in advance