Unless you specify a path to an XML file using a configURL or a path to a complete gallery folder using a baseURL, SimpleViewer will look for the XML file to be named 'gallery.xml' and to be located in the same directory as the web page containing the gallery's embedding code (and your gallery's XML file is not in that location).

As you have uploaded a complete gallery folder ('/galeriak/prg20090601/'), you can use a baseURL in your embedding code to point towards it.

Use the following embedding code and your gallery should display fine:

<!--START SIMPLEVIEWER EMBED.-->
<script type="text/javascript" src="/galeriak/prg20090601/svcore/js/simpleviewer.js"></script>
<script type="text/javascript">
    var flashvars={};
    flashvars.baseURL="/galeriak/prg20090601/";
    simpleviewer.ready(function () {
        simpleviewer.load("sv-container", "350", "300", "FFFFFF", true, flashvars);
    });
</script>
<div id="sv-container"></div>
<!-- END SIMPLEVIEWER EMBED -->

For reference, the baseURL method of embedding is documented here.

[Original post moved to new forum thread.]