I keep trying to log in to iCloud via Safari on my iPad2 and i get this https://www.icloud.com/ipad_welcome/ telling me to set up the device. It is set up....as far as I know and I've checked that iCloud is turned on and all the switches are turned on. All seems correct, but keeps telling me to set it up. I can get into it on my iMac no problem. Suggestions?