Somethings up all of a sudden with my iPhone 4. It doesn't want to synch with my Mac Mini via WiFi. If I start the synch from the Mac, is just goes to looking for iPhone, doesn't find it then quits. Sometimes it throws a message about not locating the iPhone. If I start the synch from the phone, it looks for the Mac Mini then just returns to the start sync button as if nothing happened. And sometimes all is well and it syncs fine. It has been working flawlessly till last Friday when all this weirdness started. Any troubleshooting steps to try?