Ubuntu- AMD drivers installation help!!!

I have installed ubuntu 12.04 on my dell inspiron 15R SE with 2gb 7730m ati raedon graphics. But it seems has not installed the proper drivers in any possible way i tried. Can anyone get the issue solved???😕
Whenever i try to install them using proprietary drivers the post release updates do not get installed instead gives an error to check the log for jockey-gtk. And by installing it from the terminal too it doesn't show any effects. Please Help...😐