What is ActivInspire?ActivSlate won’t register

When I go to register my activslate, when I select register on the state, it does not seem to be allowing me to enter the code with the six letters across the top. I have reset the hub, I have the latest activinspire downloaded. It will give me the word register on the slate, but when I go to put the code in listed on the dashboard, the slate does nothing. I had it registered before, but have not used it for a while and now it seems to be no longer “registered”.