Envy Cant' Save Config

[FredJones]

I have a GeForce 8400 GS and I ran Envy on my new Ubuntu 9 and it works--I can setup the screens but when I save the config I get:

Failed to parse existing X config file '/etc/X11/xorg.conf'!

How do I fix this?

Thanks.

[FredJones]

Solution is to run

sudo nvidia-xconfig