Infinite Scroll and custom template

Hello,
infinite scroll works perfectly on home.php and with blog posts. However on custom template and custom query that loads any custom post type its not working. I use it in combination with page-navi and i target wp-page navi selectors. It works fine for home.php but on custom template i just see regular wp-page-navi pagination not infinite scroll. Console dont give any errors. But i tried to add manualy link to catch-infinite-scroll JS file and javascript init code , and then its working. So plugin does not load its JS on any page except home.php. Why is that?