Chunky edges

Hello
Im a 3dsmax user who is converting to blender.
I am trying to render a sphere (nurbs)
The rendered sphere has jaggered edges? I have the OSA button on and the value 16 selected. Can anyone tell me how to get a smooth edge (I tried dithering but didnt seem to do anything?)
Thankyou
Moodie

Go into edit mode and to the edit buttons (F9), and in the Curve Tools panel, turn up Resolution U and V. I think that should do it.

-Laurifer

Thanks heaps
Seems to have done the trick!
Moodie