This posting is older than 6 months and can contain outdated information.
Thanks for asking.
Please restart the computer when the prefs pane asks you to.
If you delete the driver prior to a restart, the restart won't have the desired effect.
If, after installing the driver and restarting the computer when prompted to, the driver isn't loaded nonetheless, please take a look at Console.app > "All Messages" for "RBIOKitHelper" and "Candelair" and post your findings in reply or file a support inquiry at http://www.iospirit.com/contact/ with a description of your problem and the log findings.
Best regards,
Felix Schwarz