Unable to show gallery: Responsive Lightbox & Gallery

I would like to ask, I have recently installed the plugin named Responsive Lightbox & Gallery. I am happy to find this plugin and have it installed. Then, I uploaded photos and created my first gallery with this plugin, I copied and pasted the generated php code to my page template.

I got an error. The result turned out this [rl_gallery id="0"]

The code for the album I created is this –> if ( function_exists( 'rl_gallery' ) ) { rl_gallery( '61' ); }

I added beginning and ending php code then become this and put it in my template <?php if ( function_exists( 'rl_gallery' ) ) { rl_gallery( '61' ); } ?>

Any ideas to make my plugin work?