Acording to Linksys
Linksys, A Division of Cisco Systems, Inc.
Product: WUSB54G ver.4
Last Released Date: 1 / 19 / 07
Last Driver version: 22.214.171.124 (Windows Vista 32-bit)
Try un-installing, reboot, then re-installing.
Configure your wireless settings.
This driver hasn't been updated in awhile, so you may have to use compatibility mode.
See what happens...i wish I could be there the odds greatly imcreases if i could see in person what is going on, ohh well
My friend had exactly the same device, only diference it wasn't working anymore, threw it in the garbage and bough a dlink PCI wireless adapter she's happy now..lol