My slider images have disappeared

Hi, I have added two feature images and titles to my slider on my homepage, they were working perfectly and now they are just showing the title text and not the images. Now I've clearly amended something somewhere but can't figure out what. I did at one point change the number of posts seen to 1, which wasn't long after I had made that change did I notice the slider posts had gone. So I changed that back to 10 Blog pages show at most I have tried adding the feature images in again, and even uninstalled Catch Everest and reinstalling, but still my slider isn't displaying. ANY help greatly apprieciated!! (http://www.cocktailmarketing.co.uk)