.js loaded but sliders not working

[scalpmonkey]

Hi,
firs thanks for the great script. Its wonderful! :)

I have a small problem. I'm implementing this in Joomla site, more precise in the HTML extra fields in K2 articles. The problem is when I add <script src="http://mysite/calc/js/simple-slider.min.js" type="text/javascript"></script> within the code everything works fine but when I remove that line and load the simple-slider.min.js from the Joomla core, within the site its not working. In the page source I see the simple-slider.min.js loaded.

Where should I search the problem?

Thanks,
skullmonkey