Default [Solved][Sola] Stuck in bootloop, flashtool doesn't work, locked bootloader

Hi guys, I believe my phone is bricked/stuck in bootloop and I need your help. I was trying to flash this ROM and just before I started to install, after I did a full wipe, the phone hanged, I did a soft-reset and my Sola got stuck in bootloop. I tried flashing .54 FTF stock ICS ROM, but Flashtool keeps giving me an error and aborts the flash. (also, after less than a minute, the phone will go out of flash mode and get stuck on Sony logo)

Is there another way I can flash back a stock ROM and unbrick my phone? Thanks in advance for the help, I hope you can help me out, I'm a total noob, it's the first time I tried to flash a custom ROM

EDIT: BTW, I hard reset the phone several times in attempt to turn it off and boot in flash mode, since the phone will not shut down.

2nd EDIT: I can't get into recovery either.

3rd EDIT: SOLVED using the x86 version of flashtool instead of the x64.