Windows error installing Linksys wireless USB adapter

I had successsfully installed a Linksys wireless USB adapter (WUSB11B) a year
ago. I made some changes to my SMC wireless router, SSID name, MAC address
filtering. When I updated the adapter to use the new SSID name I was unable
to connect through to the internet. Checked MAC # and is right. Couldn't
resolve so I un-installed the adapter, and re-installed from CD.
Instructions said to install sw first, then pluggin the USB adapter. W98
sees the device and starts installing it. Adapter searches for router, finds
it, then I get Windows error message saying there was an illegal operation in
the adapter wusb11b. Tried newer drivers but same result. Please advise on
what I can do to resolve this error.