Upgrade an nb0 file with MTTY: problems

[playerkiller]

Hello everyone, i hope someone knows what the hell my JasJar bootloader have, since i'm trying to flash my device without success.
I've searched everywhere in the forum but found just a message with no reply. :(

First of all, i've unlocked my jasjar, it's now a superCID device. Or well, i guess so, since i can exec lnb commands.

Here you are the "log" from mtty:
-------------------------------------------------------
USB>task 32
Level = 0
USB>info 2
HTCS00000000 î¢-HTCE
USB>lnb c:\image.nb0
:F=c:\image.nb0
:A=70100000
:O=00000000
:L=FFFFFFFF


start NB image download

Fail to synchronize with the host (1)
USB>
-------------------------------------------------------

Using the "l" command jasjar hangs and MTTY claims a timeout in \\\wcehUSB1 or something after 5 minutes.

Any idea? I've tried with USB2 and USB1.2, tried differend PC models and differend baud but nothing change.
The "info 2" returns a strange SuperCID message. 2 bad.
Any advice is appreciated!

----------Refresh------------------------
I've also tried to upgrade bootloader to v1.1 but still have same issues...