[Question] bricked moto C XT1756

[Lanemon]

Hi guys, thnx in advance for the help. This is my situation:
- I ve got a moto C LTE LATAM XT1756, type m29df. I m pretty sure its this one:  [Only registered and activated users can see links Click here to register]
- I had succesfully flashed TWRP with "SP flash tools", and a lineage os 14 rom. I also had rooted my device, but when I tried to encrypt the phone, my device bricked. Now, when i try to turn it on I get nothing.
- I ve tried unsuccesfully to unbrick the phone with "SP flash tools" with tutorials like this one:

- This is the stock rom I m using Motorola_Moto_C_XT1756_MT6737M_NAMATH_56_NRD90M.046_subsidy- UNLOCKED_CFC_14052017

- I think the correct files I m supossed to use are these ones: DA: DA_SWSEC_6737m_98736_71604.bin, MT6737M_Android_scatter.txt, auth_sv5_LenovoNamath.auth.

- I ve tried both on linux and on windows, combinations with diferents DA, scaters, and auth files, but I keep geting errors. Mainly this two

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BROM Exception! ( ERROR : S_BROM_DOWNLOAD_DA_FAIL (2004)


SB port is obtained. path name(/dev/ttyACM0), port name(/dev/ttyACM0)
USB port detected: /dev/ttyACM0
BROM connected
Downloading & Connecting to DA...
connect DA end stage: 2, enable DRAM in 1st DA: 0
COM port is open. Trying to sync with the target...
Failed to Connect DA: S_BROM_DOWNLOAD_DA_FAIL
Disconnect!
BROM Exception! ( ERROR : S_BROM_DOWNLOAD_DA_FAIL (2004)

[H/W] Fail to download DA to baseband chip's internal SRAM!
[HINT]:
1. There's an cable communication problem between FlashTool and BootROM.
2. Target might be shutdown unexpectedly or target lost power supply.
[ACTION]
1. Try again.
2. Proceed H/W checking in download cable and target side com port.
3. Monitor if power-drop occured in target side.)((ConnectDA,../../../flashtool/Conn/Connection.cpp,131))

And

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S_SECURITY_SEND_AUTH_FAIL (6029) , MSP ERROE CODE : 0x00.


Connecting to BROM...
Scanning USB port...
Search usb, timeout set as 3600000 ms
add@/devices/pci0000:00/0000:00:14.0/usb1/1-7

add@/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0

add@/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/tty/ttyACM0

vid is 0e8d

device vid = 0e8d

pid is 0003

device pid = 0003

com portName is: /dev/ttyACM0

Total wait time = -1551152601.000000
USB port is obtained. path name(/dev/ttyACM0), port name(/dev/ttyACM0)
USB port detected: /dev/ttyACM0
BROM connected
Downloading & Connecting to DA...
connect DA end stage: 2, enable DRAM in 1st DA: 0
COM port is open. Trying to sync with the target...
Failed to Connect DA: S_SECURITY_SEND_AUTH_FAIL
Disconnect!
BROM Exception! ( ERROR : S_SECURITY_SEND_AUTH_FAIL (6029) , MSP ERROE CODE : 0x00.


[HINT]:
)((ConnectDA,../../../flashtool/Conn/Connection.cpp,131))

- I ve tried to run SP flash tools, as admin, as root. I ve connected the cellphone pushing +vol, -vol, both.

I m a bit lost, I would really apreciate if someone could point me in the right direction. Am I using the wrong rom? wrong files? 

Thnxs!!