Slider not working

Hello. Need some help with the slider. 1. I'm trying trying to add images in to the slider as it's said in the instructions(http://catchthemes.com/theme-instructions/catch-everest/). But when i add the images true post (1140x450 as the slider size) nothing shows up. Why is that and what can i do to fix it? We added images true the hosting account(wp-content/themes/catch-everest/images/) by simply replacing slider1.jpg and slider2.jpg images with the images wanted to be shown but that is not what i wanted to cause i can't change the text(Mount Everest, Nepal Preyer wheels) so pls help. Here is link - http://www.podkrepa-plovdiv.com?/ 2. There is a site using the same theme - http://afghanistan-parsa.org/ How can i make the slider with the more pages and the text added at the bottom of the image as it is on this site? Thx in advance