Just to be a bit more specific...
Wireless card: http://www.dlink.com/products/?pid=531
The card is in the 2nd PCI 2.2 slot and I cannot put it in the first because my second 9600gt is in the way. The LED on the wireless card does not come on at all. I am using a different PSU from before. Windows will not recognise its existence.
If you only use one 9600 graphic card and put the network adapter to the second PCI device, could the PC recognize the device?