I have a problem with after effects cs4. Right so I start the program. Creates a new compotition. Creating a new "Solid" An choosing "effects" "generate" Ramp" I choose the colors and everything is ok. (i'm creating a intro btw). I create a new "solid" "effect" "simulation" "CC particle world". and when i'm changing "longevity" the screen driver stops and has to restart!!! ???? WTF??? plz help.