VT/NX not present on Mac Pro Early 2008 ?

Hello!

I'm trying to install HAXM ("Intel Hardware Accelerated Execution Manager") on my Mac Pro Early 2008. This software provides faster Android virtual machine.

I've got message:

"VT/NX not present

Your computer does not meet the minimum requirements for this software. Intel(R) HAXM cannot be installed on this computer. Please refer to the Intel(R) HAXM documentation for more information."

I've downloaded MacCPUID from Intel's site. I've checked that VMX (VT-x) is present on my processor (Intel Xeon CPU E5462@2.80GHz).

Additional information:

- OSX ML

- Boot ROM: MP31.006C.B05

- SMC (system): 1.25f4

I've hard that could be problem with not enabled VTX after cold reboot or smth.

Any help will be appreciated!