by the looks of it - your site is giving 404 message to the primary javascript files that make the slider work smooth.
http://www.midas-jewellery.com/rough/slider/jquery.jcarousel.min.js http://www.midas-jewellery.com/rough/slider/jquery.easing.1.3.js
are both missing as well as the pagination PNG's http://www.midas-jewellery.com/rough/images/pagination-bg.png http://www.midas-jewellery.com/rough/images/pagination.png
try and link those up and see if that sorts out your problem