Nvidia Quadro K2000M on Dell Precision M4700 - Drivers not working

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http://askubuntu.com – I just did a fresh install of Ubuntu 12.04 LTS and installed the nvidia drivers from their website (304.60 Latest Long Lived Branch). They are just not working. Resolution is down to 640x540 or something. I run sudo nvidia-xconfig getting as result: Using X configuration file: "/etc/X11/xorg.conf". Backed up file '/etc/X11/xorg.conf' as '/etc/X11/xorg.conf.backup' New X configuration file written to '/etc/X11/xorg.conf' but when I try to open the settings with nvdia-settings I get: You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run `nvidi (HowTos)