Sliders not working

I’ve tried so many sliders plugin’s and they all get stuck at the loading or doenst show up at all.

http://copasteste.site11.com/

Anyone knows what might be? The theme already have a “add banner” option, but I can’t add any images cause in the manage banners page it show’s I have no Brands or Categories (which is a lie) and them I can’t add anything.

I think Jquery might be the problem.