Connect iBook to my Linksys network on windows pc's

I have a home office with a Pent II PC and two laptops
running on Windows 2000 and on a Linksys wireless network.

I just got an iBook that I want to tie into the Linksys
network. The iBook sees or recognizes my SSID name, but
when I click on the iBook network connection and then
scroll down to my SSID name it asks for a password and I
have entered every password I have and can not get a
connection.