Can't add Windows 8 KMS key to KMS server

[AWS]

I get the error below each time I try to add one of our Windows 8 KMS keys. I installed this update and followed the kb article:

http://support.microsoft.com/kb/2757817

 

Installation of the Proof of Purchase failed. 0xC004F015

Partial Pkey=X3B5F

ACID=24259a22-3bf0-44af-a68b-1b858bce1894

Detailed Error[?]

 

Please advise. If this isn't the correct forum, please move accordingly.

Thank you.

 

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