[Plugin: Yet Another Related Posts Plugin] WP3: no images are shown

Hi,

I use WordPress 3.0 multiblog and my theme does not use extra “custom fields”, but it uses the new function of WordPress 3 “post thumbnails”.

Each post has an image, that is uploaded, attached and used as “post thumbnail”.

What need I to modify, that these images are shown in the related posts area?

Within the grey boxes of the following screenshot there should be the images:

http://i25.tinypic.com/xml7jd.jpg

Any idea?
Thanks.

http://wordpress.org/extend/plugins/yet-another-related-posts-plugin/