[Plugin: Audio] Problem with remove_action function

Hi!
I really like your Audio plugin. I’m using plugin only on certain types of pages, so I wanted to load plugin resources only for these pages. I’m trying to do it in my functions.php file and right now code looks like:

global $_audio_wp_plugin;

remove_action('wp_print_scripts', array (&$_audio_wp_plugin, 'scripts'));
remove_action('wp_print_styles', array (&$_audio_wp_plugin, 'styles'));

But this code doesn’t work. Do you have any comments?

https://www.ads-software.com/extend/plugins/audio/