First I had error with loading images.

Then I have been browsing here in the issues, trying to fix my problem.
I have used: http://drupal.org/node/536844#comment-2218538

I have implemented this as follows:

I file:
galleria_options.js

add following lines:
var firstItem = $('ul.galleria li:first').addClass('active').find('img').addClass('selected');
$.galleria.activate(firstItem.attr('src'));

Before this line (line53):
// when the ajax call is complete, load galleria - used when viewing in a lightbox!

It helped me so far, that now my main image shows up, but no thumbnails. And when click on the image/prev/next buttons no img shows up + the first img is all gone, and do not shows up again. Seems the code under the main-img is broken somehow. Just can´t figure out how....

If anyone could help me, I would really appreciate it.

Thanks in advance!
AndreaD