Windows Server 2008 Enterprise Resource Kit

I am attempting to install my 180-day Evaluation Software from Microsoft Publishing “Windows Server 2008 Enterprise Resource Kit”. It Installs via Easy CD Install utility onto my ProLiant SL6000 Scale-able System (2 x ProLiant SL165z G7 Servers). On reboot after install , it says the key is not valid.

Windows 2008 VPS via Windows Server 2008 Enterprise Resource Kit.