jPlayer doesn't play in Lightbox2 and/or reduced template

Hi there,

We've been recently reworking our D7 site to use content popups in Lightbox2 instead of standalone content pages. We use a reduced template that displays nodes inside a Lightbox2 (Path: /node/nid/lightbox2). The problem ist that in these overlays the jPlayer no longer plays the mp3 files. If I open the node in full view (Path: /node/nid) the mp3s play fine.

As the page is published I can give you some links to see the behaviour:

This plays fine: http://www.marwilo.de/node/41
This doesn't: http://www.marwilo.de/node/41/lightbox2

Beware: The text is german...

Thanks in advance
Christoph