Recently, my RC16 (from my D10-300) has developed a tendency to "forget" all the programmed codes for my TV and A/V receiver every 3 or 4 days. I'll go to turn off my TV and the box will pop up saying this function isn't programmed. So I program it again, it works for a few days, and the process repeats. I've replaced the batteries, and that didn't help... any other ideas? It's starting to get annoying.