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.
You need to download and install the Sony SxS UDF Driver, available here http://pro.sony.com/bbsc/ssr/cat-recmedia/resource.downloads.bbsccms-assets-mkt-recmedia-downloads-upgrades.shtml