ATI xpress 1200 on kubuntu 64 bits

[girardhenri at free.fr]

Hi all :)
I can't use compiz or even kde4 composite (which should be enaugh ) on 
kubuntu 64 bits hardy/gutsy ...
I once succeeded but since no more after reading all ubuntu /kub... how 
too..
I crashed many time my display...
So at the moment I am waiting for more infos...
Does one have same problem and find solution ?
I tried envy but no success
regards
Henri