Unable to add shortcode to index.php?

Hello, I am trying to add the following shortcode only in index.php but the carousel not showing. Here is the code:

<?php echo do_shortcode('[psac_post_carousel show_read_more="false" media_size="full" sliderheight="550" loop="false" arrows="false" dots="false" autoplay="false" limit="3" category="251"]'); ?>

The page I need help with: [log in to see the link]