Custom Post Type + Infinite Scroll Issue


So I am trying to get the jQuery inifinite scroll plugin to work on my custom portfolio page. On this page I could have a total of 300 images showing. I would like to just display about 30 at a time and as the user scrolls down the infinite scroll plugin will kick in and load another batch of 30. I am also using the jQuery Isotope plugin for filtering methods. As of right now within my code I am not getting the posts to load more as I scroll down, not sure what I am missing. The Isotope is working fine and my libraries for inifinite scroll are loaded.

Here is my WP_Query for pulling the posts:

Hopefully someone can show me what I am missing in here.