Cannot run VT-x/EPT on Early 2008 MacPro

Hi,

I updated the Boot ROM on my Early 2008 MacPro 3,1 to version MP31.006C.B05 so that I can run Windows 7 in a VT-x/EPT virtual machine.  But Fusion 6.0.2 says my MacPro doesn't support VT-x/EPT.  Is there something else I need to do?

Thank you.