GameCircle not working on Kindle Fire

I recently tried using GameCircle in my game by following the instructions provided here.

I followed all the steps mentioned for Android but the following statement always returns false.
bool isServiceReady = AGSClient.IsServiceReady();

I tried it on Kindle Fire, will post the model information later.

Does anyone know what could be going wrong? or what additional steps I have to do.

Its Kindle Fire (2012)

Kirk, Did you ever get Amazon IAP / GameCircle working? I’m having the same issue. I’m looking for some help. I don’t know where i’m going wrong or what piece of the puzzle i’m missing.