only the half solution, you haven´t read it careful.
these
<link href="http://www.stein-musik.de/modules/anynews/frontend.css" rel="stylesheet" type="text/css" media="screen" />
<link href="http://www.stein-musik.de/modules/event/frontend.css" rel="stylesheet" type="text/css" media="screen" />
must stand between <head> and </head>.
the normal way is to do it with
<?php }
if(function_exists('register_frontend_modfiles')) {
register_frontend_modfiles('css');
register_frontend_modfiles('js');
} ?>
before </head>. if you need jQuery for a modul or so you must write
<?php }
if(function_exists('register_frontend_modfiles')) {
register_frontend_modfiles('css');
register_frontend_modfiles('jquery');
register_frontend_modfiles('js');
} ?>
that´s the right solution.