Lindsey,
If you are using OS10.8, that is why your pens are not interacting. Our current driver is not supported on that OS. We have a Beta driver available for you to download at the link below. You will need to join this group to download the driver.
community.prometheanplanet.com/.../42591.aspx
Before installing this Beta driver, please disconnect all Promethean hardware from the computer, uninstall the current driver from Applications/ Promethean/ ActivDriver/ Uninstall. Restart the computer and install the Beta driver.
Thanks!