Get Image plugin – thumbnails problem

Hello everyone,

How do I configure get image plugin to make my thumbnail images appear? I have inserted my images through hiperlink (not upload on media) and they only show inside the blog page and not has a thumbnail preview.

Page where it isn’t showing the thumbnail for “FLOWER TOP”:
http://www.chicitout.co.nf/category/crop-tops/

Note: the thumbnails that are showing is because I uploaded the images to the media. But I don’t want that. I want to use hiperlink, like the “FLOWER TOP”.

I installed Get Image plugin but I don’t know how to make it work. Inside the readme file said:

### How do I add it to my theme? ###

There are several methods, but in general, you would use this call within The Loop.

<?php if ( function_exists( ‘get_the_image’ ) ) get_the_image(); ?>

But I don’t know how, where to put the code, etc.

Thanks!