hello ashley and thank you for your help, i didn't updated you but i re-installed the drivers and now C2 seems to work fine, only previous projects still have problems (still don't know why), but if i restart a new project all works fine. It's very strange i know...
I still have to install r67 because now i'm not at home, i'll do it when i'll be back at home.
Anyway, i would like to become an early adopter, i really like your hard job guys and i'd like to support it. But if sometimes i have problems with C2 i don't want to spent money for something that now works but still don't know in future. I know that the main problem is my graphic card. I'll look to change my notebook as soon as possible (my notebook is quite old, i bought it in november 2007), but for now i'm wondering if there will be the possibility to have a stable version of C2 for my graphic card ATI Mobility Radeon HD3470 , if you succeed to provide your software C2 for most of the graphics cards, even old ones, I think that you will increase the number of supporters. Or maybe not, this is only my problem, in that case don't worry about me, i'll look to change my notebook as soon as possible (unfortunately MONEY are always the main problem when you have to buy a new notebook :D).
your italian fan