ok i'll be a little more specific (sorry i really know nothing about wireless)
I have...
cable internet access
a netgear rangemax wireless router that was previously set up in my house for my sister (by my sister but she moved out) the network used to work
i then got a D-link Wireless 108G Destop Adapter (an internal card not a USB drive) which i installed in my kitchen computer
the kitchen computer recognizes that there is a wireless network in the house but for some reason it cannot connect to it.
(im sure there are more necessary detail but i dont know what to look for so let me know)