HELP issue when try to flash and relock (C5303 ULB)

I did a clean install of CM 12.1 and after y tried to flash a Stock Rom (ftf) but i couldn't do that.
Show this log.
I only want relock bootloader (that i can't. With adb i give an error and with Flashtool the progress stop when y click on relock)

CM12.1 and kernel of the Rom

1- First try

Quote:

13/003/2015 04:03:07 - INFO - Device connected in flash mode 13/003/2015 04:03:22 - INFO - Selected Bundle for Sony Xperia SP (C5303). FW release : 12.0.A.2.254. Customization : Customized CE4 13/003/2015 04:03:22 - INFO - Preparing files for flashing 13/003/2015 04:03:36 - INFO - Please connect your device into flashmode. 13/003/2015 04:03:37 - INFO - Opening device for R/W 13/003/2015 04:03:37 - INFO - Reading device information 13/003/2015 04:03:48 - INFO - Unable to read from phone after having opened it. 13/003/2015 04:03:48 - INFO - trying to continue anyway 13/003/2015 04:03:48 - INFO - Start Flashing 13/003/2015 04:03:51 - INFO - Processing loader.sin 13/003/2015 04:03:51 - INFO - Checking header 13/003/2015 04:03:51 - ERROR - Processing of loader.sin finished with errors. 13/003/2015 04:03:51 - INFO - Ending flash session 13/003/2015 04:03:51 - ERROR - Error in processHeader : 22 : El dispositivo no reconoce el comando. 13/003/2015 04:03:51 - ERROR - Error flashing. Aborted 13/003/2015 04:03:51 - INFO - Device disconnected

2- Second try

Quote:

13/018/2015 04:18:39 - INFO - Preparing files for flashing 13/018/2015 04:18:47 - INFO - Device connected in flash mode 13/018/2015 04:18:49 - INFO - Please connect your device into flashmode. 13/018/2015 04:18:50 - INFO - Opening device for R/W 13/018/2015 04:18:50 - INFO - Reading device information 13/018/2015 04:18:50 - INFO - Phone ready for flashmode operations. 13/018/2015 04:18:50 - INFO - Opening TA partition 2 13/018/2015 04:18:50 - INFO - Current device : Unknown: Jan 19 2014/22:13:32 - YT910M945P - Unknown: Jan 19 2014/22:13:32 - Unknown: Jan 19 2014/22:13:32 - Unknown: Jan 19 2014/22:13:32 13/018/2015 04:18:50 - INFO - Closing TA partition 13/018/2015 04:18:50 - INFO - Start Flashing 13/018/2015 04:18:52 - INFO - Processing loader.sin 13/018/2015 04:18:52 - INFO - Checking header 13/018/2015 04:18:53 - INFO - Flashing data 13/018/2015 04:18:58 - INFO - Loader : S1_Root_7054 - Version : R5G006 / Boot version : R11B023 / Bootloader status : ROOTED 13/018/2015 04:18:58 - INFO - Transfer buffer size : 32768 13/018/2015 04:18:58 - INFO - You must have the according fsc script to flash this device. 13/018/2015 04:18:58 - INFO - Flashing finished. 13/018/2015 04:18:58 - INFO - Please unplug and start your phone 13/018/2015 04:18:58 - INFO - For flashtool, Unknown Sources and Debugging must be checked in phone settings

I can't flash anything and cant relock bootloader for use PC Companion.


¿What can i do?
Depending of the rom that i install, i can do it or not.
If i flash a kernel via fastboot with recovery i can install a diferent rom, but i continue without can relock bootloader or flash a .ftf

Always gime me the same error, the "fsc script"

Also, i say that when Flashtool "start" to flash, my C5303 power off the green light, and when Flashtool stop of trying flash, the light power on again.


PD: Can't flash the file for relock bootloader and can't relock bootloader with adb.

This happend when try to relock. (Relock button clicked and green bar stopped)
oi57. tinypic. com/wb9tnd .jpg

(link with spaces)