what is dis "Couldn't find package compiz-fusion"
 

i tried to make my desktop 3d and whan use command in terminal
it tells couldt find package compiz-fusion
i dont know for which package it is saying .. m new user for linux so dont know what is package meant for ...please tell me how to get dis package for 3d desktop

Which command, and what was the output?
http://www.google.be/search?q=ubuntu...ient=firefox-a
http://news.softpedia.com/news/How-t...tu-58113.shtml

You have five threads with the same issue : Compiz / 3D,
.. and one thread is marked [SOLVED].

May be it's time that you show the output of the command :
lspci -vnn | grep -iA 1 vga

So we can know which graphics card / chip, you are using.

.....