Sorry to bother you all again.
I'm using Ubuntu 8.04 (hardy) and I'm able to run Visual Effects without a problem. Also, I'm able to play 3d games but here it starts my issue. If the Visual Effects are on the 3d applications flickers all the time, it's quite annoying. But... if I just disable them I'm able to play everything smoothly.
How do I solve this to run both at the same time?