twm instead Gnome after installing ATI proprietary

[ametrin]

Hi. I was trying to use step by step this wiki guide wiki.debian.org/ATIProprietary and no problem appeared.
But after reboot my machine, I got a just terminal with login. So I ran startx and got twm.
my xorg.conf has same lines like wiki tut. I tried reinstall gnome with apt-get install --reinstall xserver-xorg but no change.

Could you please give me some hints where to start to solve this issue?
Im new to this stuff.

[devils casper]

Hi and Welcome !

Some thing is wrong with gdm only.
Execute this at command prompt :

su -
invoke-rc.d gdm start

Post output here.

[ametrin]

Thanks for response.
The output after this command is just another prompt line.
So no output.

[devils casper]

Press Alt+Ctrl+F1 to F7. Do all ttys display command prompt? Does any of F1 - F7 key switch to blank screen?

[ametrin]

Hi. Well I had to google for different shortcut=fn+alt+Fx.
Anyway I got command prompt on each(F1-F6) and F7 does not work-no change from previous tty.

/edit: so, dont know what eaxactly happen but I 'solved' it with: apt-get install gnome, apt-get install gdm, dpkg-reconfigure xserver-xorg
Where my gnome dissapeared lol? And whats best, I have: direct rendering: yes.