cuda - Can't install nvidia drivers

Today I tried to install the Nvidia drivers on my 11.10 ubuntu.
I done everything what told on http://www.dickscheid.net/2011/10/19-cuda-ubuntu-1110/ and http://blog.ryant.org/2011/12/installing-cuda-toolkit-on-ubuntu-1110.html
then i reboot
now i see only title "Ubuntu" and ~5 points

I cant even switch to console (ctrl alt f 1-6)
anybody know what i can to do to save my ubuntu?