Hi Clare.
Thanks for posting on the forum.
If your calibration option is grayed out on the ActivManager icon on your taskbar this means that there is no connection between your computer and the ActivBoard. Please check to ensure that your USB cable from the ActivBoard is connected to your computer, please also check if this has come loose/unplugged from the other end going into the ActivBoard.
If the issue is still present, please test another USB cable directly into the ActivBoard connecting to your computer bypassing any wall boxes or connection panels that you may be using.
If you still need any assistance please reply back to this post or alternatively if you would like to contact us directly please quote your reference number which I have created to support this issue. Your reference number is 00422076.
Adam
Promethean Technical Support