After the boot loader completes the screen goes to the following image !

My VGA : xfx geforce 9600 gso 1.5g

What should I do ?

I reinstalled 11.10 , 11.04 and 12.04 but I have my problem yet !
Another point is that I install ubuntu file system in another partition . Maybe Some Wrong config file is still in my home folder .

In my opinion it's not about driver problem because I have 11.10 with driver without any problem and I think this problem occurs when I try ubuntu 10.04 live CD !

I try ubuntu 12.04 final release too ! and the same problem occurred !