lenox video card problem

hey i just downloaded linux (ubuntu) and installed it then tryed to install the driver for my video card (radeon 9550) and i didnt know how PLEASE HELP ME IM DESPRATE !!!(and i cant spell apperintly)

Go to Applications -> Add/Remove then from the Add/Remove Applications window select System Tools from the list of applications available check the ATI binary X.Org driver and also scroll down and check the Hardware Drivers (the ones that didn’t come pre-installed you can have both installed) then hit the Apply Changes button and it will be downloaded and installed .

If the ATI binary X.Org driver doesn’t solve your problem go to System -> Administration -> Hardware Drivers and it will search and download other options for you .

sorry tryed it