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My HBoot is HBOOT-2.00.0027, I got the following problem when I was trying to unlock my HTC Desire HD following the instruction

It seems HBOOT 1.0 has this problem and someone suggests to update HBOOT to 1.2, but my HBOOT is already 2.0, should I downside update to 1.2?

E:\HTC_G10\system_software\root_tools>fastboot oem get_identifier_token
(bootloader) [ERR] Command error !!!
OKAY [ 0.016s]
finished. total time: 0.016s

E:\HTC_G10\system_software\root_tools>fastboot.exe /?
usage: fastboot [ <option> ] <command>

  update <filename>                        reflash device from
  flashall                                 flash boot + recovery + system
  flash <partition> [ <filename> ]         write a file to a flash partition
  erase <partition>                        erase a flash partition
  getvar <variable>                        display a bootloader variable
  boot <kernel> [ <ramdisk> ]              download and boot kernel
  flash:raw boot <kernel> [ <ramdisk> ]    create bootimage and flash it
  devices                                  list all connected devices
  continue                                 continue with autoboot
  reboot                                   reboot device normally
  reboot-bootloader                        reboot device into bootloader

  -w                                       erase userdata and cache
  -s <serial number>                       specify device serial number
  -p <product>                             specify product name
  -c <cmdline>                             override kernel commandline
  -i <vendor id>                           specify a custom USB vendor id
  -b <base_addr>                           specify a custom kernel base address
  -n <page size>                           specify the nand page size. default: 2048
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HTCdev notes that the Desire HD requires an HBOOT upgrade to unlock. It looks like the most recent version is 2.00.0029. – eldarerathis Mar 3 '13 at 3:43

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