Win32_Processor VirtualizationFirmwareEnabled always returns False

Question

I try to query if Virtualization (VTx) is enabled on the System via VB.net

Dim searcher As New ManagementObjectSearcher(
            "root\CIMV2",
            "SELECT * FROM Win32_Processor")
            For Each queryObj As ManagementObject In searcher.Get()
                MsgBox(queryObj("VirtualizationFirmwareEnabled"))
            Next

Altough it is enabled in the BIOS, and I can run 64-Bit Guest Systems in my VirtualBox, Win32_Processor is always reporting false.

If I have a look in the Task - Manager, it states "Virtualization: enabled"

Is there another possibility to query the VTx Status?

Thanks in advance!