image manipulation, resize adn unique name

[eluser]the_unforgiven[/eluser]
write_file() helper not what i was after.

I have this code

Code:

function _do_upload_file()
{
     //upload path and config
  $config = array(
   'allowed_types' => 'jpg|jpeg|gif|png',
   'upload_path' => $this->gallery_path,
   'max_size' => 3000,
   'overwrite' => false,
      'remove_spaces' => true
  );

     $this->load->library('upload', $config);
  $this->upload->initialize($config);
  
     if (!$this->upload->do_upload())
     {
         $this->form_validation->set_message('_do_upload_file', $this->upload->display_errors());
         return FALSE;
     }
     else
     {
   $config = array(
    'image_library' => 'gd2',
    'create_thumb' => TRUE,
    'source_image' => $this->upload->upload_path.$this->upload->file_name,
    'new_image' => $this->gallery_path . '/thumbs',
    'maintain_ration' => true,
    'width' => 150,
    'height' => 100
   );
   $this->load->library('image_lib', $config);
    
   if (!$this->image_lib->resize()){
          $this->form_validation->set_message('_do_upload_file', $this->image_lib->display_errors());              
   }

  }
  

}

Which currently uploads files to assets/uploads/userfiles/imagename.jpg for example but now the code above should resize the image uploaded adn then place into a folder called thumbs inside assets/uploads/userfiles/thumbs for instance is what I have setup, can any one help me on this?

Have I missed something or done something wrong?