Did you configure the MEBx? Please refer to "Intel Management Engine BIOS Extension Setup (Intel ME Configuration)" section in the Start Here Guide located at:
Let us know if this solves the issue.
The DG33FB Motherboard doesn't support Intel AMT. It supports Intel Viiv.
You can refer to its specs here: http://reviews.cnet.com/motherboards/intel-desktop-board-dg33fb/4507-3049_7-32469438.html?tag=specs