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.
Check the Device Manager to see if there is a "Standard Dual Channel PCI IDE Controller" under "IDE ATA/ATAPI Controllers" with two "ATA Channels" that have a yellow warning mark on it. If so, select the Standard Dual Channel PCI IDE Controller, click "update driver" and navigate to "Sonnet Tempo SATA QIO PCI Express Adapter" and install it. (Note that this requires that you first run the Qio driver installation.)