检测非MFI注册卡读卡器到iPhone

I want to create a one application for communication of card reader with iPhone via dock connector. but problem is there my card reader accessory is not a MFI registered. so i cant get any kind of notification when i connect or disconnect device so please can any one tell me how can i connect or detect Non MFI registered accessory tot iPhoneI want to create a one application for communic