Featured Image Problem

Hi there i play around with a new Theme called Pennews. Mostly all fine, i found an issue with ACDP regarding Featured Images.

Under each single “Post” (Entry in the direcory) there is a short overwiew with related posts (Entries), this posts are showing other Entries from ACDP BUT without the Image, there is an ugly grey placeholder (which comes from the theme). I like to replace this placeholder with the current image of the Directory postings… The them Support says:

The image doesn’t display because you’ve not added the featured image for this post type.

Please check your custom post type settings, make sure you’ve enabled the feature image option then upload for each posted item.

and this

You should check it from the Classified Ads plugin. The content of your link comes from a custom post type by the plugin you’ve installed.

Any Hint for me what i can do?