a couple of things to check on, what is the full build of the AMT Fw 3.2.??? - are you trying to provision with a certificate? if so which one? tell me aobut your domain and use of subnets.
check the Intel web site for the latest bios F/W build and drivers SOL/LMS, its 18.104.22.1687 FW kit and will be located on Intel Download Center under the “Discontinued Products” section for Desktop Boards/Intel 3-series chipsets. there werre multiple repairs for multi domain and subnet provisioning along with soem security updates...let me know if you ahve any othere issues