Help, need pointed to documentation.

Hello all.  I signed up for 60 day trial of RHEV3.  So far, I have (2) Small HP SFF desktop PC's w/ 2GB ram and 40GB hard-drives with RHEV3 hyperviser.  I have a VM of RHEL 6.2 running on my MAC in VMware.  I figured out how to get RHEV-Manager installed and working.  But when I log into the Web Portal, the (2) RHEV hosts will not subscribe.  Says something about "Enabling Power Management"

I was hoping to use these two low end PC's to test Livemigration of one or two VM's.  Can someone tell me or point to me where I need to go to get this Power Feature turned off?  I'm reading the guide to this, while thourough, I am encountering things it doesn't cover....

Joe