I bought a cheap aux out lead for iPhone from eBay, so it has dock connector to audio left, audio right, video and usb for charging. I used to use it for my 5g iPod Video. I connect it to my iPhone 3G and TV and it works, I can watch the videos on the screen for about 10 seconds before telling me that "This accessory is not made for the 3G" Then the video goes back to the iPhone. It obviously works, is this Apple disabling the cable cause I didn't buy it from Apple? Do they have authentication chips in them?