first thing...
you have to install nvidia-glx-new package.
Code:
sudo apt-get install nvidia-glx-new nvidia-settings
After installing, restart system. Go to terminal and type...
Code:
sudo nvidia-settings
It will give you nvidia settings panel. Change resolution n your monitor type there...
Another way is that
Go to Application -> Add/Remove. And change there to "All available applications".
then Go to System -> Administration -> Hardware
It will show you nvidia drivers are not in use. Install it n restart... rest procedure is same.
Note : Hope, you will specify a good title for your thread next time...
Good Luck...
And BTW, I don't think there is a Linux called Ubuntu Ultimate 8.04
Either you are using
Ubuntu 8.04 or
Ubuntu Ultimate 1.8 / 1.9