[Q] Kindle 2013 3rd Gen. KFSOWI bricked topic

Hello,
I think I just bricked my Kindle Fire HD 2013 KFSOWI running 11.3.2.1.

Here's what I did
- solder a fastboot cable
- download the root utility from this page:

https://
drive.
google.
com
/#folders/0B-dSyq3U-jVDNFZhSW1jd2RuQ0k

(kyleberry.graphics)

- put kindle into fastboot mode

the kindle showed :

Code:

---

Start downloading
writing boot...done

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Code:

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======================================================================
======================================================================
Welcome to Kindle Root Utility by the KFSOWI Modding Team
Special Thanks to:
Moronig
jcase
fi01
======================================================================
======================================================================
WARNING THIS WORKS ONLY WITH KINDLE HD 7" 2013 ON 11.3.2.1
            DOES NOT WORK ON 11.3.1.0
======================================================================
======================================================================

You MUST have your kindle powered OFF and connected to a
    FASTBOOT cable


Downgrading Boot Image...
< waiting for device >
usage: fastboot [ <option> ] <command>

commands:
  update <filename>                        reflash device from update.zip
  flashall                                flash boot + recovery + system
  flash <partition> [ <filename> ]        write a file to a flash partition
  erase <partition>                        erase a flash partition
  format <partition>                      format 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
  help                                    show this help message

options:
  -w                                      erase userdata and cache (and format
                                          if supported by partition type)
  -u                                      do not first erase partition before
                                          formatting
  -s <specific device>                    specify device serial number
                                          or path to device port
  -l                                      with "devices", lists device paths
  -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.
 default: 0x10000000
  -n <page size>                          specify the nand page size. default:
2048
  -S <size>[K|M|G]                        automatically sparse files greater th
an
                                          size.  0 to disable






target reported max download size of 1005584384 bytes
sending 'boot' (5844 KB)...
OKAY [  0.324s]
writing 'boot'...
OKAY [  0.424s]
finished. total time: 0.750s
resuming boot...
OKAY [  0.001s]
finished. total time: 0.011s
Rooting Device...

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AND NOTHING MORE HAPPENED.

I tried to boot up the kindle but it just showed the grey kindle logo (not the orange animated).

Can someone please help me? I searched aroud so many posts without finding a solution. :(