[ubuntu] I lost my "Ubuntu' unity choice ..please help me to get it back.

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http://ubuntuforums.org – Hello everyone. I hope you can help me with this one, problem because of my own mistakes. based on the title above...I did something to the unity . I try to install/upgrade to unity 5.0 from here http://techhamlet.com/2012/01/unity-5-on-ubuntu-11-10/ after all installation completed, I restarted my laptop. and when I want to login, there is no "Ubuntu" anymore. There is only "Ubuntu 2D" and I don't like it at all. I tried to install unity back but this appear : Code: utm@utm:~$ sudo apt-get install unity [sudo] password for utm: Reading package lis (Hardware)