iPhone 5 phone book won't import 2008 honda accord exl navi

I just bought a 2008 honda accord exl navi and I was able to pair my Iphone 5 via Bluetooth no problem. I can make and receive calls but I can't import my phone book. When I go to the import phone book option on the navigation screen the option is grayed so I can't select it. Can anyone help me please?