Evaluation copy of Windows 8.1 Enterprise is asking for install key

I downloaded the x64 iso from http://technet.microsoft.com/en-US/evalcenter/hh699156.aspx and I am attempting a clean install the thing keeps asking for a KEY.  Which the documentation says it shouldn't do but here I am.  I tried the 4 win 8.1 keys you can get from here.

http://technet.microsoft.com/en-us/library/jj612867.aspx

No good. 

So what do I do now.