[Help] Z Ultra (C6802) LB: Wiped System with Custom Recovery - Sony Xperia Z Ultra

Hello everyone,
I have a Xperia Z Ultra C6802 running on 14.2.A.0.290 locked bootloader with root and custom recovery.
Two days ago I flashed an audio mod zip using custom recovery, but it ended up with a bootloop. Then I tried to wipe the cache and dalvik cache from recovery, but did not realize that I checked the wipe system too. Now I also lost my custom recovery from the phone.
The phone stuck at Sony logo (not even showing a beam animation) like this:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Whenever I connect the phone to a wall charger, it will blink a red led notification and after few seconds will show the same Sony logo as shown above, but it will charge the battery (the charger gets hot but the phone also getting so hot because the screen will not turned off). I have to use hard reset button or power button + volume up to turn the phone off.
I downloaded some ftf files to be flashed in order to bring the phone back to a stock rom. I download some ftf from
http://forum.xda-developers.com/xpe...tf-depository-sony-firmware-releases-t2829387
The ftf files I downloaded are:
1. Xperia Z Ultra (C6802) 14.4.A.0.108 "Generic MY"
2. Xperia Z Ultra (C6802) 14.2.A.0.290 "Generic"
3. Xperia Z Ultra (C6833) 14.3.A.0.757 "EURO"
I also installed Flashtool 0.9.18.2 with Z Ultra drivers, flashmode driver, and fastboot driver on my PC (Win 7 64 bit). Whenever I try to flash a ftf file, I got errors like this:
08/000/2014 05:00:01 - INFO - Flashtool Version 0.9.18.2 built on 09-06-2014 22:30:00
08/000/2014 05:00:02 - INFO - Executing search strategies to find proxy selector
08/000/2014 05:00:02 - INFO - No proxy found for IE. Trying next one
08/000/2014 05:00:02 - INFO - Strategy firefox failed trying next one : No Firefox installation found
08/000/2014 05:00:02 - INFO - No proxy found for java. Trying next one
08/000/2014 05:00:02 - INFO - Syncing devices from github
08/000/2014 05:00:02 - INFO - Scanning devices folder for changes.
08/000/2014 05:00:12 - INFO - Pulling changes from github.
08/000/2014 05:00:20 - INFO - Devices sync finished.
08/000/2014 05:00:25 - INFO - Device disconnected
08/000/2014 05:00:31 - INFO - Selected Bundle for Sony Xperia Z Ultra (C6802). FW release : 14.2.A.0.290. Customization : R4B
08/000/2014 05:00:31 - INFO - Preparing files for flashing
08/002/2014 05:02:06 - INFO - Please connect your device into flashmode.
08/003/2014 05:03:36 - INFO - Device connected in flash mode
08/003/2014 05:03:36 - INFO - Opening device for R/W
08/003/2014 05:03:37 - INFO - Reading device information
08/004/2014 05:04:34 - INFO - Unable to read from phone after having opened it.
08/004/2014 05:04:34 - INFO - trying to continue anyway
08/004/2014 05:04:34 - INFO - Start Flashing
08/004/2014 05:04:34 - INFO - Processing loader.sin
08/004/2014 05:04:34 - INFO - Checking header
08/004/2014 05:04:34 - ERROR - Processing of loader.sin finished with errors.
08/004/2014 05:04:34 - INFO - Ending flash session
08/004/2014 05:04:34 - ERROR - Error in processHeader : 995 : The I/O operation has been aborted because of either a thread exit or an application request.
08/004/2014 05:04:34 - ERROR - Error flashing. Aborted
08/004/2014 05:04:34 - INFO - Device disconnected
This errors always showed up no matter ftf file I was trying to flash. I never get this kind of errors when I played around with Xperia ZL.
Whenever I connect the phone to PC it will automatically running in flashmode (without pressing power button + volume down).
I also tried to fix the phone with Sony PC Companion, but the software will not detect the phone when it ask me to connect the phone in flashmode (the PC recognize my phone).
Please help me guys to solve this problem. I need your help. I have no idea what to do :crying:

---

Perhaps you could try SUS
However the software is today discontinued but it still works
http://www.xperiablog.net/2014/07/24/rip-sus-sony-ends-support-for-update-service-software/
direct link, (SONY has removed their link from their website)
http://www.mediafire.com/download/2x830xdr3srskss/Update_Service_Setup-2.14.10.201407111005.exe