Found the problem myself there was a missing language file, that adds the content to the custom define_main_page, but I still have a problem, I modified the css and even if I changed the width the slider is truncated, I mean these lines >>> #slider li, #slider2 li{/*define width and height of list item (slide) entire slider area will adjust according to the parameters provided here */width:864px;height:340px;overflow:hidden;}
They suppose to define the width but they are not working