Thanks for your reply. But the problem was that i could try only the DDR option for the RAM in the Burn Tool process and if it was enabled the other option, SDRAM, i had a message for "fail to init usb" (red color bar in the Burn Tool).
Finally i tried the following ROMS without any result: 1.27, 1.63, 1.82, 1.86, 1.90 (only with the DDR option enabled)
Is there any other possible ROM available out there?
Is it possible to mix nboot or eboot files from different ROMS?
Any other idea?
Thank you very much again.