Tim: Since you are using TwinView I think you will need to add "SecondMonitorHorizSync" and "SecondMonitorVertRefresh" as described on http://us.download.nvidia.com/XFree86/Linux-x86/1.0-9755/README/appendix-d.html ...
Tim: orizSync" and "SecondMonitorV ertRefresh" as described on http:// us.download. nvidia. com/XFree86/ Linux-x86/ 1.0-9755/ README/ appendix- d.html ...
Since you are using TwinView I think you will need to add "SecondMonitorH