Hi vocalexpress,
Thanks for using Auto ThickBox Plus, and sorry for late reply.
I use it on http://www.vocal-express.de on every image (exept the gallery).
I checked your web site and found the site outputs the following error message. ("exept" is typo?)
Uncaught Error: Syntax error, unrecognized expression: [href$=.mp3] (jquery.js)
The error causes at jquery.js. ThickBox is jQuery plugin. This is the reason Auto ThickBox Plus plugin does not work.
Then I found the following code at wpaudio.min.js by debugging the issue.
if (_wpaudio.convert_mp3_links) {
jQuery('a[href$=.mp3]').addClass('wpaudio');
}
The point is jQuery('a[href$=.mp3]'). This should be jQuery('a[href$=".mp3"]') or jQuery("a[href$='.mp3']") (note single/double quotations)