Hi,
I assume you are reffering to the search results page right?
That is unfortunately out of the control of the plugin. Themes are usually not very well prepared to display results other than posts/pages, as default WordPress search only does that. While Ajax Search Pro tries to add the title/content and image hooks wherever possible, it is up to the theme search archive template to display the results.
If your theme comes with a results page customizer, then I recommend checking that, some themes have options to show media files on the results page and options to customize that layout.