I am setting up an Airport Extreme in our house and all of our computers connect perfectly, except for my mother in law's who unfortunetly lives with us. She has an old Compaq Celeron tower with a Linksys 802.11b USB antenna. Her computer will see the AE but it will not connect. I just says that it cannot find the signal anymore and to rescan. Is there a way to get her crappy setup to work with my new AE?