The Plugin don't get my Settings

Hey there!
I’ve tried to run this plugin but I saw that the buttons images are not loaded – if to be exact – the code:
echo "<script type=\"text/javascript\">if (jQuery && jQuery.facebox) jQuery(function($) { $(\"$selectors\").facebox(WPFB.options); });</script>\n";
is not working,
I tried to cahnge this code to:
echo "<script type=\"text/javascript\">jQuery(function($) { $(\"$selectors\").facebox(WPFB.options); });</script>\n";
Now I got the Buttons Graphics – BUT I see each image duplicated 2 times [also the caption & the title]

How can I make it work as it should be?

https://www.ads-software.com/extend/plugins/wp-facebox-gallery/