I have an iPhone 4 and now iTunes doesn't recognize the phone when i plug it in to the computer. I have window 7. I have tried to unintall and reinstall both iTunes and AMDS but it didn't solve the problem. I also tried to restart AMDS and set it to automatic, but it didn't work either. I noticed that when I play a movie on Media Player Classic and put it to full screen mode, after 10 minutes or so, the screen goes back to its normal size. I saw an error message at the bottom of the screen. The message says "Focus lost to mobile device service". It's been like this for couple of months already. I couldn't add anymore new song to my phone. I've run out of option try to fix the problem myself, and in desperate need of help. Thank you!