[SOLVED]Image Intervention URL Manipulation shows blank image

I'm trying to use the url manipulation of the Image Intervention package to handle image via url this tutorial. But the browser returns an empty image like this:

I changed these line in the config file:

'route' => 'imagecache',
'paths' => array(
        storage_path('app/images'),
    ),

The url that I tried is like this: localhost:3500/imagecache/original/{file_name}
And leave everything else the same So are there any steps that I'm missing? Thank you


via Le Dinh Nhat Khanh