Help not getting the image_height

[eluser]Exxon[/eluser]
I am in the process of creating a filemanager for fckeditor for my cms. But when I upload the images I get the error that image_height (As this would contain the height according to the documentation) is undefined !

I followed the example in the user guide

Code:

$config['upload_path'] = 'resources/api/website_files/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size']    = '2000';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$config['encrypt_name'] = true;
$config['overwrite'] = false;

$this->load->library('upload', $config);
if ( ! $this->upload->do_upload('file')) { display errors here }
else {
$updata = $this->upload->data();

$idata = array(
                                        'type' => 1 ,
                                       'website' => $website ,
                                       'user' => $this->websites->get_user_id($data) ,
                                       'name' => $updata["orig_name"],
                                       'filename' => $updata["file_name"],
                                       'size' => $updata["file_size"],
                                        'width' => (isset ($updata["image_width"])) ? $updata["image_width"] : 0,
                                        'height' => (isset ($updata["image_heigth"])) ? $updata["image_heigth"] : 0,
                                       'mime' => $updata["image_type"],
                                    );
}

Thanks