Mary,
Did you have another driver installed before installing the 5.8 driver? Try uninstalling the driver and reinstalling and see if that helps. To do this, disconnect all Promethean hardware from the computer. Go to Applications > Promethean > ActivDriver> Uninstall. Restart the computer and go back to Applications > Promethean > to ensure that the ActivDriver has been removed. If not, uninstall it and restart the computer again. If so, install the latest version with the link below.
Your password is: KyrsX0Km
Name: ActivDriver_v5.8.46.dmg
Size: 44.45 MB
Expires: March 13, 2013
Thanks!