Hi Scott.
When you get this error on the Promethean Planet validation tool, it means that it has been previously generated using the serial number you have used.
So we can help assist you further, please could you contact Promethean directly by filling in a contact form found on this link.
Please provide the case reference on the form which is: 00429275 along with your serial number for your ActivBoard.
If you have any further questions please let me know.
Adam
Promethean Technical Support
