Image Manipulation Problem

[eluser]jvk22[/eluser]
I am trying to create a thumbnail and resize an image when uploaded, but when I call both functions, the one called first is the only one that works.

Code:

public function do_upload()
{
  $target_path = "assets/uploads/";
  $target_path = $target_path . basename( $_FILES['uploadedfile']['name']);
  
  if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path))
  {
   $data = array(
   'title'=>$this->ci->input->post('title'),
   'email'=>$this->ci->input->post('email'),
   'image_location'=>$_FILES['uploadedfile']['name'],
   'about_me'=>$this->ci->input->post('about_me'),
   'date_uploaded'=>date("Y-m-d h:i:s")
   );
   $insert_id = $this->ci->upload_model->add_photo($data);

   mkdir('assets/uploads/'.$insert_id);
  
   copy('assets/uploads/'.basename( $_FILES['uploadedfile']['name']), 'assets/uploads/'.$insert_id.'/'.basename( $_FILES['uploadedfile']['name']));
  
   unlink('assets/uploads/'.basename( $_FILES['uploadedfile']['name']));

   //$this->create_thumbnail('assets/uploads/'.$insert_id.'/'.basename( $_FILES['uploadedfile']['name']));
  
   $this->resize_image('assets/uploads/'.$insert_id.'/'.basename( $_FILES['uploadedfile']['name']));
   $this->create_thumbnail('assets/uploads/'.$insert_id.'/'.basename( $_FILES['uploadedfile']['name']));
  
      return array('success'=>'The file '.  basename( $_FILES['uploadedfile']['name']). ' has been uploaded');
  }
  else
  {
    return array('error'=>'There was an error uploading the file, please try again!');
  }
}

public function resize_image($path)
{
   $config['image_library'] = 'gd2';
   $config['source_image'] = $path;
   $config['create_thumb'] = FALSE;
   $config['maintain_ratio'] = false;
  
   $config['width'] = 250;
   // $config['height'] = 50;
  
   $this->ci->image_lib->initialize($config);
   $this->ci->image_lib->resize();
}

public function create_thumbnail($path)
{
   $config['image_library'] = 'gd2';
   $config['source_image'] = $path;
   $config['create_thumb'] = TRUE;
   $config['maintain_ratio'] = TRUE;
   $config['width'] = 125;
   // $config['height'] = 50;
  
   $this->ci->image_lib->initialize($config);
   $this->ci->image_lib->resize();
}