Gaming device being detected, but no inputs

[Assamita81]

Hi. I built a gaming device using this library and an Arduino Pro Micro. I tested it in my computer and it worked perfectly fine. Then I shipped it out, and the recipient of the device reported that when he plugs it in, Windows detects it, and you can see the device in his devive manager list, but no inputs are recorded. Besides wires being disconnected during transport, is there any other possible problem causing this? I don't think you need drivers for the Arduino Pro Micro when it's configured as a gaming device, do you?