2008 Mac Pro won't get through product registration screen (setting up a new SSD)

Hi,

A few months ago my Mac Pro had an electrical fire. Both of the SSDs (mirrored) were damaged, so I have bought a new SSD and transferred the data to it from a Time Machine backup that was on the hard drive. The problem is, when I go through the setup/registration process, I can't click continue. The button is grayed out. Here is an album I made of the registration process: http://imgur.com/a/DAWwr.

There was user data on the Mac already, so I don't know why I have to re-do this registration process. Is it possible to skip this process? Any help or advice would be greatly appreciated. Thanks!