Hello,
I just found out that the problem and want to post it in case someone else faces the same…
The problem was on the browser (whether I use chrome, safari or internet explorer).

By default, I don’t let any browser to run unauthenticated scripts. Whenever I go to “Adv.Slider” tab, I need to:
– Select “show content” if I am using IE9
– Load unsecured scripts manually on the top right side – for chrome

That might be an improvement for future updates? It would give more confidence to the people that are using the plugin.

Many thanks for this great plugin anyway! 🙂