wireless config util. sees my network, but I can't connect

kaalki

My laptop was set up for a wireless connection to a home network using a
Linksys router. It has been working fine, but today, I cannot connect. The
network does not show up in the list of available wirelss networks (although
several of my neighbors' do. . .). The network does show up in the wireless
configuration utility, though. If my network card sees the network, whcy
can't I connect to it?