64 bit guest on nested ESXi 5 not supported

I get a error about "Longmode is unsupported" when trying to install windows 2012 server on a guest vm on a nested ESXi 5 instance.

I've tried all the proposed resolutions I could find on the forums.  Does anybody know how to fix this?

On the physical and nested ESXi instances I have confirmed vhv.allow TRUE config,

~ # cat /etc/vmware/config

libdir = "/usr/lib/vmware"

authd.proxy.vim = "vmware-hostd:hostd-vmdb"

authd.proxy.nfc = "vmware-hostd:ha-nfc"

authd.proxy.nfcssl = "vmware-hostd:ha-nfcssl"

authd.proxy.vpxa-nfcssl = "vmware-vpxa:vpxa-nfcssl"

authd.proxy.vpxa-nfc = "vmware-vpxa:vpxa-nfc"

authd.fullpath = "/sbin/authd"

authd.soapServer = "TRUE"

vmauthd.server.alwaysProxy = "TRUE"

vhv.allow = "TRUE"

but HV is still showing not VT capable?

~ # esxcfg-info | grep "HV"

         |----HV Support............................................0

         |----HV Replay Capable.....................................false

         \==+HV Replay Disabled Reasons :

            |----World Command Line.................................grep HV

I booted into the nested ESXi bios which is a PhoenixBios but there is no option for VT setting

In the vCenter GUI I checked "on" the following box,

CPU/MMU Virtualization

Use Intel VT-x/AMD-v for instruction set virtualization and INtel EPT/AMD RVI for MMU  virtualization

CPUID Mask

Expose the NX/XD flag to guest

I also upgraded virtual hardware and the vm says vmx-09

Saved and Rebooted everything

How do I get the 64 bit guest on the nested ESXi to work?

The physical server is a Dell PE310 with Intel Xeon CPUs and I did enable VT in the bios which seemed to work correctly because I installed ESXi on it, plus nested ESXi.

References for posts I've read for proposed solutions,

http://www.vcritical.com/2011/07/vmware-vsphere-can-virtualize-itself/

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&docTypeID=DT_KB_1_1&externalId=1011712

http://www.vmware.com/files/pdf/software_hardware_tech_x86_virt.pdf

http://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.vmadmin.doc_41/vsp_vm_guide/configuring_virtual_machines/t_change_cpuid_mask_virtual_machine_settings.html

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1008170

http://www.virtuallyghetto.com/2011/07/how-to-enable-support-for-nested-64bit.html

http://www.vi-tips.com/2012/09/enabling-64-bit-vms-on-nested-esxi-51.html