I have installed a new 1600mAh battery and now my PC doesn't recognized that my iPhone 3G is connected. Without being recognized, it won't charge nor can I sync. Of course, the first thing I did was installed the new iTunes 9, but the more important part is that the iPhone is not showing up in my drives. Luckily, the phone will charge from the wall, but if anything goes wrong with the phone, then I will not be able to restore it with iTunes, or sync. Any ideas?