Help ! How to upgrade the OEM version?

I am a Norton Internet Security 2008 OEM customer. How do i upgrade to Norton Internet Security 2009 ? I have try to upgrade by download the 2009 product from here . But since i did not provide with a product key in Norton 2008 version, how do i activate the Norton 2009 ? In the Norton account, only “NOT PURCHASE” at there. I think I should provide with a product key.

Message Edited by Ronald on 11-13-2008 12:21 AM