Fullscreen Antialiasing (3D)

Hi all! I have resolve my previous problem with game freezeing/minimizing by install a Kubuntu So, there is another problem... with antialiasing. The game (Space Rangers HD) has two game mode - space top down (2.5D) and strategy mode (3D). In strategy mode AA works fine and there is all ok. But in space mode on some object pixels are good visible (interface are ok). Here is the screenshots:

Space mode (look at the triangled ship):

Planetary battle, strategy mode (it's all ok):

Can i somehow enable AA forced or something? I have tried to enable forced AA in NVIDIA X Server Settings panel, but nothing happen. Maybe there is another way to do this?