I have a new Dell Optiplex running Win XP Pro. When ever I attach a USB compact flash card reader, I have tried 3 different ones, the workstation after aperiod of time stops being able to connect to a drive on the server on a wired Lan. When I disconnect the USB device the mapped drive works again. I've loaded all the latest Win XP patches and the latest Bios and drivers from Dell and I still have the same problem. This problems happens on all 4 workstations on the LAN. Any ideas?