Action Replay DS

Hi could anyone help me please.I have purchased an Action Replay DS system for my nine year old son but when I try to use it it always comes up with "unknown game" - would anyone have any ideas on how to fix this? Any help would be greatly appreciated thanks

Did it come with a usb cable? it plugs into the Action Replay and to the computer it should have also came with a small CD you install it to your computer and it will allow you to update the Action Replay to the current games via the website, this is why you are getting the "unknown game". Hope that helps.