I downloaded iOS5 on my iPhone 4 a few days ago, and I've been trying to use Reminders. I had it set to remind me to text my parents when I arrived at school and left school. I double-checked whether or not Reminders had permission to use location services, it hadn't. So I enabled it. But it still hasn't worked. I receive no reminder of any sort. Am I doing something wrong? Can someone walk me through the process?