Redirect To Mode Print

Hi for all.

I need help for this situation:

After insert in the database, i need show to user mode of impress the page redirecting to samecontroller/print.

I add in the grocery crud this code:

$crud->callback_after_insert(array($this, 'log_user_after_insert'));

         $crud->set_lang_string('insert_success_message',
           ' Mode Print.

           <script type="text/javascript">
              window.location = "'.site_url(strtolower(__CLASS__).'/'.'print').'/'.$this->session->userdata('primarykey').'";
           </script>
           <div style="display:none">
           '
       );

In the funcion of callback:

    function log_user_after_insert($post_array,$primary_key)
   {
       $this->session->set_userdata('primarykey', $primary_key);

       return true;
   }

But don't works.

Any help?

Thanks a lot !

Sorry for the poor english.

spyflash