I have a wireless g. i have a wireless g pci adapter and it is installed on a computer running

Question

i have a wireless g pci adapter and it is installed on a computer running windows 2000 server. It is supposed to receive the signal from the wireless router wrt54g. It does not find the signal but somehow it finds signals coming from outside the house. It doesn't connect to any of them and the taskbar says network cable unplugged. I also have a nic installed in the computer that did work via ethernet until the wireless come along. neither will work and i have tried over and over again to make it work but it wont