[TYPO3-ttnews] Including perfectlightbox

[Nicole]

Hello there,

I am using tt_news at my TYPO3-installation. Images should be displayed 
in a lightbox created by perfectlightbox.

Unfortunately I cannot make the lightboxtitle work. You ca have a look 
at it here: 
http://tmp.tierschutzverein-freiburg.de/ueber-uns/neuigkeiten/archiv/detail/article/normale-demonews.html

The alternativ text of an image should be displayed as lightbox-title.

I've got this snipped in my setup:
plugin.tt_news{
  displaySingle.image{
     imageLightbox2 = 1
     imageLightbox2.imageset = 1
     imageLightbox2.title = altText
  }
}

Can somebody tell me how to put the alttext of an image to the 
lightboxtitle?

Thanks a lot.

Regards,
Nicole