why is my ATI graphics driver not working?

i just installed ubuntu day ago and im total newb in this system. after installation and ubuntu update i found out in "System Info-"Graphics":

Driver-Unknown,

Expirience-Standard

after that i found "Aditional Drivers" utility in "System Settings" and i found there 2 proprietary drivers:

1. ATI/AMD proprietary FGLRX graphics driver (post-release updates)


2. ATI/AMD proprietary FGLRX graphics driver

when i activate first, it shows me error and it wont install.
when i activate second, installs fine and asks for restart and after i restart graphics are slow and choppy, and youtube vids are slower then when was with no driver. and "System Info-"Graphics" shows next:

Driver-VESA: RS780MN

Expirience-Standard

My Graphics card is ATI Radeon HD 3200
My netbook is Lenovo x100e

*update
i uninstalled ATI/AMD proprietary FGLRX graphics driver and manually installed driver i downloaded from oficiall ATI site and system's graphics are still choppy.
I can opet ATI Catalyst Control Center, and it detect my graphics card, and everything looks fine but system is still choppy.