Server 2012 Evaluation shuts down every hour or so and won't activate.

i'm going through training installed evaluation version of server 2012 here: http://technet.microsoft.com/en-us/library/jj574204.aspx

according read, should functional 180 days , go lock down mode reboots every hour , things that.

my problem installed 2 weeks ago , it's in lockdown mode.  offline install don't have way go online , activation.  tried doing phone activation , said huge number invalid.

i called in , told evaluation version testing before software actualyl released.  supposed reboot every hour "security measure" , 180 days max work since server 2012 officially released eval version wasn't valid more.

is there way fix stops shutting down every hour?

if on network can run "slmgr -ato" , should activate.

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be kind , mark answer if helped.

Windows Server  >  Windows Server 2012 Setup