Hey Paul
Please could you update to the latest ActivManager (ActivDriver) version as this will have been tested with Windows 8 operating systems as 5.7.22 was released prior to Windows 8.
Please go to this link to download the 5.9.27 ActivManager version. The ActivBoard flame should change when your pen is on the boards surface, if yours is not doing this, please could you reset your ActivBoard. To do this, please ensure the projector is turned off prior just incase the electrics are on the same power socket. Please disconnect the mains power socket for the ActivBoard and disconnect the USB cable from your laptop. Leave for about 10 minutes and reconnect and test. Please try and calibrate the board after this step. Has this helped solve the issue?
Have you tested other laptops on this ActivBoard? Do any of them detect the pen?
I have created a separate support case for yourself Paul, the case number is 00382877. If you would like to contact us to help this issue over the phone, please contact us on the phone line listed at http://www.prometheanworld.com/us/english/education/support/technical-support-numbers/
Adam
Promethean Technical Support