Recently purchased 3 FLIRC for media centers in my house. I wanted to use my existing At&t remotes since I no longer have At&t. When I use the At&t remote in the At&t mode, I keep receiving that button already exists when I haven't programmed the button yet. When I press the no programmed button, it blinks other buttons that have been programmed. Is it possible to use this remote with FLIRC? I have tried programming this on firmwares 2.3, 3.3, and 3.5. I'm using Win7 OS.