Hello Jamel,
Your case reference number is : 00439776.
To use the finger to interact with the ActivBoard your ActivBoard will have to be one of the follow ActivBoard 500, ActivBoard Touch or ActivPanel Touch. Should you have any of these you will have to download the latest version of ActivInspire and ActivDriver and you should be able to use touch.
Thanks
Franklin
Promethean Tech Support