Wireless

Hello,
I have a wireless Linksys router and it has been working fine for a while. I use the wireless linksys usb adaptor. Just recently the program on my computer, the little icon next to the time on my task bar that allows me to select the wireless network I want to connect to, disappeared. I can not find this window anywhere and I cant get connected to tehe network. All I see is the linksys program down there and that is no help. When I right click it theres an option called "Use XP wireless config." but that does nothing when I click it. is there anyway to find this window to select my wireless network without the icon in the corner near the time showing up?