No galleries in IE, Firefox, chrome and safari?!?

Hello,

This weekend I have finaly published my website in joomla 1.6. I'm using SIGE to create galleries with a lot of pictures. However some of my visitors have complained about these galleries. They are not able to to view the large pictures in IE, Firefox and chrome. I have tested this myself with all the browsers in the "thema" of this topic and found out I only am able to view the large pictures in IE?

In the other browsers the pop-up shows together with the download and save button. The screen were the pictures should be showing is however white and it stays white?!

How can I fix this?


Edit;
Forgot the link to a page with gallerie;

autoinformatief.com/index.php/categorien...t-opel-gt-vs-opel-gt

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