From your log file:
(EE) NVIDIA(0): Failed to initialize the NVdriver kernel module!
(EE) NVIDIA(0): *** Aborting ***
If you are positive
that NVdriver is loaded (if it's listed in /proc/modules, it is loaded), then check either /var/log/messages or dmesg (near the end of either) after a failed attempt for a reason your system isn't able to initialize the NVdriver module.
9 times out of 10, the "failed to initialize" message is because the kernel module isn't loaded, and in that one case where that isn't the problem, the problem 90% of the time is that the card can't get an IRQ because "Assign IRQ to VGA" is turned off in your BIOS. If that's the problem, you will see a message to that effect in one of those logs (dmesg is the direct kernel log; /var/log/messages is generally the concatenated kernel logs of every time the system has been up).