Airturn BT-105 Pedals not responding with iPad

I started using my newly bought Airturn BT-105 pedals. I intend to use it on my unreal Book application in my iPad. But it seems like it is not working. I successfully paired the pedals on my iPad and the light goes on when pressing the pedal, but the application is not responding. What is causing it to stop responding? How can I fix it?
