jquery-ui.js only loading when logged in

I'm working on an audio-player based on jme-Player. I'm on drupal 7.2 using the latest version of jQuery Update (7.x-2.2). I created a view, themed some tpl.php-Files and the the player is loading smooth and working fine ... as long as I'm logged in.

I'm not a programmer and my research is sometimes a bit stranded, but I found out, that in a non-logged-in case the jquery-ui.js isn't loaded. I tried it in Safari 5 and FF 4 on Mac. The module is activated, jquery.js is loaded from googleapis.com, only jquery-ui.js is missing. I don't know if that's cause or effect.

I appreciate your help,
krabbe