Xperia Z C6606: unable to communicate with sony update engine (error 11)

[ZEROO4478]

i got this error that says i can't connect to sony updates, I messed up my phone when i tried to flash my ROM, but I know is possible to restock repair it, but Imma newbie on this, isnt so easy like iphone so sombody could help me? I put that repair thing on pc companion and every time I got this error... I downloaded 2 ftf files the stock one and the generic with 4.4.4 to update to kitkat (T-Mobile maybe isnt never going to update us) so im going to try both but idk why my pc isnt openning flashtool and it says error, I want to know if I need a special Flashtool version, or how i could do to stock repair it, Im getting tired of downloading drivers all day long and nothing, please helpmeee!!!! 

[Thommo]

Firstly watch your language and secondly what Rom did you flash?

What system is your Pc using? Is your bootloader unlocked?

[ZEROO4478]

ok sorry, I didnt downloaded a custom ROM but I was Using the official rom for my device (it was 4.3) I Rooted it and downloaded plenty of things, i saw one app called pimp my rom so I installed it, it says that I needed to install custom.ini file or something like that to start to install things like new drivers for my device and it just needed to reboot to aply these settings, i did but after that it isnt working, its like booting automatically everytime, and stuck on the T mobile loader,how i could save it? im on windows 7, i got all the drivers and the ftf files but i just want to repair it or its possible to install a custom rom like this? what do you recommend? if isnt possible just help me to repair this

[ZEROO4478]

and no i didnt unlock the bootloader,is possible to unlock it on brick mode? lol 

[Thommo]

Because you are rooted and your bootloader is locked means that official programs won't work for you so you need to follow this guide in this link - Ignore the title but do download and decrypt the firmware you would like to use, using Flashtool, or find and download a pre-made stock Rom and skip to Flashing with Flashtool

[ZEROO4478]

ok thanks i go to watch what i can do, i didnt know i cannot repair it from PC company, didnt like that ...

[Thommo]

That's what happens when you root

[ZEROO4478]

mmmm, i cant do nothing for the moment, you know if i can stock recover my cellphone like from when i bought it? im getting tired of this i didnt want to do nothing more.... just repair it

[ZEROO4478]

well now I tried to flash the stock rom to recover it but i get this error

20/040/2015 11:40:12 - INFO - Device connected in flash mode
20/043/2015 11:43:14 - INFO - Selected Bundle for Sony Xperia Z (C6606). FW release : 10.4.C.0.814. Customization : T-Mobile US
20/043/2015 11:43:14 - INFO - Preparing files for flashing
20/050/2015 11:50:18 - INFO - Please connect your device into flashmode.
20/050/2015 11:50:20 - INFO - Opening device for R/W
20/050/2015 11:50:21 - INFO - Start Flashing
20/050/2015 11:50:21 - INFO - Processing loader.sin
20/050/2015 11:50:21 - INFO - Checking header
20/050/2015 11:50:21 - ERROR - Processing of loader.sin finished with errors.
20/050/2015 11:50:21 - INFO - Ending flash session
20/050/2015 11:50:21 - ERROR -
20/050/2015 11:50:21 - ERROR - Error flashing. Aborted