Error loading an template view

[eluser]Diegosf93[/eluser]
I have this problem when i try to load an template view with another view, lets see the code:

This is the code of the template:

Code:

<?php $this->load->view('header.php'); ?>

<?php $this->load->view($contenido); ?>

<?php $this->load->view('footer.php'); ?>

Then in the controller i have this:

Here I load a droplist with categories and i pass it to the "Agregar_Operador" view in a variable.
And then load the template with the ·$data array inside the "Agregar_Operador" view to the template.

Code:

$datas['categorias']=$this->Admin_Model->Cargar_Categorias();    
$data['contenido']=$this->load->view('Panel_Admin/Agregar_Operador', $datas,true);
$this->load->view('template',$data);

This appear me in the browser:
http://imageshack.us/photo/my-images/402...ravlh.png/


Thanks!