I followed the solution suggested here but making those changes in my xorg.conf file didn't help. When I restart my computer, I still have a resolution of 1280x1024 even though my native resolution is 1440x900. I have re-installed drivers a couple of times, but still nothing.
Nvidia drivers version: Operating System: Linux-x86 NVIDIA Driver Version: 304.64 Server Version Number: 11.0 Screens: 1
Ubuntu 12.10 (32bit)