[Plugin: WP Bannerize] PHP Code Doesn't Work

I’m using version 3.0.2 of the plugin.

I disabled and re-enabled the plugin, and it still doesn’t work.

I’m using the following code:

if(function_exists( 'wp_bannerize' )){
			wp_bannerize( 'group=leaderboard&container_before=&container_after=&before=&after=&random=1&limit=1' );
}

I don’t get any error, or any output either. I tried adding the code to wp-bannerize_functions.php, line 20, to $wp_bannerize_frontend->bannerize( $args ); but that doesn’t do anything either.

https://www.ads-software.com/extend/plugins/wp-bannerize/