GeForce Antialiasing help appreciated...

I do not know alot about hardware, just that when it works its a dream but when it doesnt its a b!tch.
The only thing I know about antialiasing is that it smooths out bumpy non horizontal or vertical edges. Today I have been experimenting with different antialiasing settings, both in FS graphics options, AND my nVidia control panel, but no matter what setting I choose, my edges remain bumpy and there are no visable changes whatso ever.
Do I need to reboot everytime I change one of these settings? I am never prompted to.
My card is a GeForce FX 5200. Any help would be massivly appreciated.
Thanks
JB
The only thing I know about antialiasing is that it smooths out bumpy non horizontal or vertical edges. Today I have been experimenting with different antialiasing settings, both in FS graphics options, AND my nVidia control panel, but no matter what setting I choose, my edges remain bumpy and there are no visable changes whatso ever.
Do I need to reboot everytime I change one of these settings? I am never prompted to.
My card is a GeForce FX 5200. Any help would be massivly appreciated.
Thanks
JB