Does an 8800 gts not work with windows 7 aero?

I used the Windows 7 Upgrade Advisor thing and I got this message:

"Your current graphics adapter won't support the Windows Aero user interface. If you want to experience the benefits of Windows Aero, contact your PC manufacturer or retailer to see if an upgrade is available."

I checked Aero's requirement and it looks like my graphics card has all of them. Is this a glitch or something? If someone knows whats going on help would be appreciated.

Thanks!

 

Sorry for double post, but could the reason be because I am running on Windows XP?

Thanks

 

According to nVidia, it should be fine:

http://www.nvidia.com/object/io_1241025430517.html

 

My notebook has a 8600 Nvidia gpu and it runs aero with no issues. Try updating your gpu drivers.

http://www.nvidia.com/Download/index.aspx?lang=en-us