Hello Darryl,
Try rebooting, detaching the dongle, then re-running the Hauptwerk installer (it will just re-install without losing any settings or organs). The final stage is installing the dongle driver, which should display a message indicating that it was installed successfully - make sure you see that and not an error message. Then reboot again for good measure.
If that doesn't help, try detaching all other USB devices (except for the keyboard/mouse) and try the dongle in each possible USB port.
If that still doesn't help, maybe try downloading the latest (GUI) Mac OS X installer for dongle driver here:
http://www.aladdin.com/support/hasp/enduser.asp
... i.e. 'HDD_Installer_MacOSX.dmg' v1.94.
No problems using/detecting the dongle have previously been reported to me on the Mac platform. I suppose there is a chance that it could be a hardware fault on the USB port, although that's unlikely.
Does that same dongle work on a PC, just to rule out the possibility of a hardware fault in the dongle?
Best regards,
Martin.