Go into device manager and "Scan for new Devices" to see an insertion or ejection. \f1 The CF cards use a hard disk IDE driver that does not expect hot plugging. Sonnet is developing an update that will allow hot plug.
Some CF cards are seen as non-removable disks. Ejecting these cards will cause the whole Qio to eject. Restart the computer to restore functionality to the Qio and do not use "Eject" to remove CF cards.