Integrated Nivo Slider problem

Hi,
I’m creating a simple test website, and I’m trying to display a slider in my front page with Temptation integrated Nivo Slider (in Temptation theme options).

My problem is that when the current slide changes (automatically or by clicking on the arrow), the next slide loads (I can see it during the transition), but instead of displaying correctly when the transition is finished, it’s the last slide that always shows up. I tried many things, including changing order of slides, changing pictures, changing number of slides, reinstalling wordpress 3.9, reinstalling Temptation theme etc., none worked. I checked the source code, PHP code, JS code and I still don’t understand why it’s happening… And nobody on the internet seems to have encountered the same problem.

I also tested a separated nivo slider (meta slider extension) in a page, there’s no problem with it. But the slider doesn’t adapt to picture’s size, I don’t understand why neither (it’s suposed to be “responsive” ?).

You can check my website to see the problem : https://www.trifouille.tk
Cyclone Slider 2 and Meta Slider on “Wallpapers” page.

Thanks,
Trifouille