[Plugin: MP3-jPlayer] Player not initializing and playing

Hi I am using the RC3 of WP3.3 (currently the latest) as well as the latest of your plugin.

After browsing through similar threads I could still not solve the issue of the player.
It seems as if the player is starting to initialize, but stops without any error (even with Debug on). It is pointed to a directory with 14 mp3s in (using the widget saying it found all files), the files are listed in the JavaScript source, but nothing else happens (when I press Play).

I also get the following error (Firebug) when I try to open the pop-up:

Error: mp3j_info is not defined
Source file: http://localhost/shimmer/wp-content/plugins/mp3-jplayer/js/mp3-jplayer.js?ver=1.7.3
Line: 154

http://ww.wp.xz.cn/extend/plugins/mp3-jplayer/