Subaculture if the card isnt recognised in the system at all, have you checked in Device Manager???
if you see something at Other Devices with the name NETWORK ADAPTER right click on it and select update driver, then you just have a look yourself dont do the auto install and again on the following page select DON'T search I'll choose the driver to install.
normally it should and would come up as Belkin 54G PCI ADAPTER.
otherwise call tech support on 00 800 223 55 460 and get a reference number to have it replaced. or you could go to
BELKIN RMA and have it replaced via this way.
if you have questions or problems you can send me a PM and I'll have another looksie for you