LAB problem: BIG-IP VE + VMware Workstation + Ubuntu

Hi!

I am trying to set up a lab to prepare for my 201 exam. This is my setup:

OS: Ubuntu 14.10, 64 bit Processor: Intel Core I5-4570 CPU@3.20Ghz x4 Hypervisor: VMWare Workstation 12.1.0 BIG-IP VE: 11.3.0.39.0-scsi

If I'am trying to start big-ip ve in VM workstation as a "guest operating system" == Other 64-bit (default setting), VMware workstation shows an error with message:

"This virtual machine is configured for 64-bit guest operating systems. However, 64-bit operation is not possible.This host supports Intel VT-x, but Intel VT-x is disabled.Intel VT-x might be disabled if it has been disabled in the BIOS/firmware settings or the host has not been power-cycled since changing this setting.(1) Verify that the BIOS/firmware settings enable Intel VT-x and disable 'trusted execution.'(2) Power-cycle the host if either of these BIOS/firmware settings have been changed.(3) Power-cycle the host if you have not done so since installing VMware Workstation.(4) Update the host's BIOS/firmware to the latest version.For more detailed information, see http://vmware.com/info?id=152."

When I try with "guest operating system" option set as "Other", VM Wrokstationd loads GRUB and shows message:

"This kernel requires an x86-64 CPU, but only detected an i686 CPU. Unable to boot - please use a Kernel appropriate for your CPU"

Please advise how to handle this problem.