dequeue styles and scripts from wp-mailinglist??

i don't need them in the frontend of my theme but they get loaded on each page. therefore i tried this:
remove_action('wp_print_styles', 'print_styles',25);
remove_action('wp_print_scripts', 'print_scripts',25);

does not work! then i tried this:

wp_dequeue_style( 'wp-mailinglist' );
wp_dequeue_style( 'uploadify' );
wp_dequeue_script( 'jquery-watermark');
wp_dequeue_script( 'uploadify');

does not work neither! why??