I've just bought a new iPad4 but can't pair with any device via Bluetooth. I've tried to pair with my 4S, my son's 5, my Mac Pro and my original iPad. I also can't pair with a new Sharon Bluetooth keyboard although this keyboard will pair and works well with all of the above Apple devices. Do I need to do something differently with the IPad4 ? I've enabled everything I can find. Has anyone else had a problem? Can anyone help, please?