Etch Desktop gives 640x480 resolution only

I’ve installed “The Perfect Desktop - Debian Etch (Debian 4.0) “on a Dell Dimension E521, AMD64 Athlon, SATA HD.
The video adapter is NVIDIA GeForce 6150 LE, the monitor is Dell E773p, H: 30KHz to 70KHz and V: 50Hz to 160Hz.
I have to issues: First, mouse frequently hangs and I have to reboot.
Second, on the xorg.conf file I see Modes “1152x864”, “1024x768”, “800x600” and “640x480” but when trying to change screen resolution, I’ve got only a 640x 480 resolution and a 60 Hz refresh rate and there’s no more options. Any help will be appreciated

 

I think you can install Nvidia drivers with Automatix. Have you tried that?

 

I'll do that, I'll try. Thank you.