I’m having the same issue -here’s my embed code. The custom post type is not showing up – I’ve checked all the settings as described above.
I tried what you suggested in your last post and the print_r shows the post I am trying to get into the mashup.
940, 'height'=>500, show=>"query", show_query=>"posts_per_page=2&post_type=directory");
echo $mappress->shortcode_mashup($atts); ?>