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.
The BIOS option ROM space is a limited resource and your machine has run out of BIOS option ROM space. The Qio BIOS takes some of this space to do the PCI bus re-arrangement and to enable hot plug. You must free space by disabling one or more unused option ROMs in BIOS. For example, you may disable a large option ROM, like the LSI RAID controller (exists on many motherboards but is rarely used.)