Can't extend my desktop

[Tom]

Recently I just finished a build with XP Pro. The graphics card is the XFX
Nvidia 8600GTS with 512MB memory and 2 x DVI outputs.

However, I can't extend my desktop to the second monitor. I have two
monitors plugged in yet windows is only detecting the one output. On my
laptop it shows 2 black squares with 1 and 2 representing the two monitors,
here I only have a picture showing a monitor with the desktop blue background.

Why is it not finding the other output?

The drivers are the latest ones from the Nvidia website?


Thanks!

 

[New Orleans Novice]

This may help. Click | Start | Run | msinfo32 <OK>

Save the file and send to nVIdia tech support. Or, open System Properties
and disable the onboard video and reboot.

System Summary is the first category in the System Information category
tree. The details pane displays general information about your computer and
its operating system. You can view information about the operating system
name, version, manufacturer, and directory location. You can verify the
version of the BIOS or EFI, the processor type, and memory information.